TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

WHITE FROST [11 records]

Record 1 2012-04-19

English

Subject field(s)
  • Mineralogy
  • Chemistry
Universal entry(ies)
Mg3Si4O10(OH)2
formula, see observation
3MgO·4SiO2·H2O
formula, see observation
14807-96-6
CAS number
DEF

A naturally occurring monoclinic mineral of hydrated silicate of magnesium which covers a wide range of products of diverse composition, shape, purity and brightness, occurs in foliated, granular or fibrous masses, appears usually under the form of a white, apple-green, gray powder or of transparent laminae or plates, with a characteristic soapy or greasy feel and a shining lustre ...

OBS

... used in ceramics, in cosmetics and pharmaceuticals, as a filler in rubber, paints, soap, putty, plaster and oilcloth, as a dusting agent, as a lubricant, in paper, in slate pencils and crayons and for electrical insulation.

OBS

Talc exists in three varieties: foliated, massive (steatite or soapstone), and indurated (talc slate or schist). Compact, massive varieties may be called steatite in distinction from the foliated varieties, which are called talc. Soapstone is an impure variety of steatite.

OBS

Chemical formulas: Mg3Si4O10(OH)2 or 3MgO·4SiO2·H2O

OBS

talc: term standardized by ISO; officially approved by the Lexicon Project Committee (New Brunswick).

OBS

Also known under a very large number of commercial designations, such as : Agalite; Asbestine; B 9; B 13; Beaver White 200; B 13(mineral) ;CP 10-40; CP 38-33; Crystalite CRS 6002; Desertalc 57; Emtal 500; EX-IT; Fibrene C 400; Finntalc C10; FW-XO; IT Extra; LMR 100; Micro Ace K1; Micron White 5000A; Microtalco IT Extra; Mistron 139; Mistron RCS; Mistron Star; Mistron Super Frost; Mistron Vapor; MP 12-50; MST; Mussolinite; Nytal 200; P 3; PK-C; PK-N; Polytal 4641; Steawhite; Supreme; Supreme Dense; Talcan PK-P; Talcron CP 44-31; Talcum; TY 80.

French

Domaine(s)
  • Minéralogie
  • Chimie
Entrée(s) universelle(s)
Mg3Si4O10(OH)2
formula, see observation
3MgO·4SiO2·H2O
formula, see observation
14807-96-6
CAS number
DEF

Silicate naturel de magnésium hydraté renfermant de l'eau et diverses impuretés [telles le fer, l'aluminium], trouvé en amas lamellaires, constituant le plus tendre des minéraux, onctueux au toucher, blanc ou coloré [...]

OBS

[Utilisé] entre autres en pharmacie, comme poudre de toilette, comme enduit pour produits caoutchoutés, dans la fabrication de produits de haute réfractarité et dans les peintures.

OBS

Identifié dans le Colour Index par le numéro C.I. «CI 77 718» et le nom C.I. «Pigment White 26».

OBS

Formules chimiques : Mg3Si4O10(OH)2 ou 3MgO·4SiO2·H2O

OBS

talc : terme normalisé par l'AFNOR et par l'ISO; uniformisé par le Comité du projet de lexiques (Nouveau-Brunswick).

PHR

Poudre de talc.

PHR

Saupoudrer de talc.

Spanish

Save record 1

Record 2 2012-03-07

English

Subject field(s)
  • Atmospheric, Climatic and Meteorological Phenomena
DEF

Deposit of ice crystals in the form of scales, needles, feathers and fans and which forms on objects in the same manner as dew, except that the water vapour of the air is transformed directly into ice crystals.

CONT

Hoarfrost [is] a deposit of interlocking ice crystals formed by direct sublimation on objects, usually those of small diameter freely exposed to the air, such as tree branches, plant stems and leaf edges, wires, and poles. Also, frost may form on the skin of an aircraft when a cold aircraft flies into warm and moist air or when it passes through air that is supersaturated with water vapor. Hoarfrost is formed similarly to the way dew is formed except that the temperature of the frosted object must be below freezing. Frost forms when air with a dew point below freezing is brought to saturation by cooling. In addition to its formation on freely exposed objects (air hoar), hoarfrost also forms inside unheated buildings and vehicles, in caves, in crevasses (crevasse hoar), on snow surfaces (surface hoar), and in air spaces within snow, especially below a snow crust (depth hoar). Hoarfrost is more fluffy and feathery than rime, which in turn is lighter than glaze. Hoarfrost is designated light or heavy (frost) depending upon the amount and uniformity of deposition.

OBS

Hoarfrost [is] due to nocturnal radiation. Hoarfrost forms during still, clear nights, is small in amount, needlelike in texture, the "needles" approximately perpendicular to the objects on which they occur, and most abundant along the edges.

OBS

hoarfrost: sometimes confused with "rime."

French

Domaine(s)
  • Phénomènes météorologiques, climatiques et atmosphériques
DEF

Couche épaisse de cristaux de glace produite par le gel d'un dépôt de vapeur d'eau.

CONT

La gelée blanche est un dépôt de glace, d'aspect cristallin, affectant le plus souvent la forme d'écailles, d'aiguilles, de plumes ou d'éventails. Elle se forme d'une manière analogue à la rosée, lorsque la température du point de rosée de l'air est inférieure à 0 °C.

CONT

Pour deux raisons, une gelée blanche cause moins de dommage à la végétation qu'une gelée noire : 1) elle tend à isoler la plante d'un froid plus intense, 2) elle libère la chaleur latente de fusion en faveur du milieu.

CONT

On considère qu'il existe trois types de gelées : Les gelées par advections ou gelées noires ou gelées de plein vent. [...] Les gelées blanches ou gelées par rayonnement. Elles se produisent surtout pendant certaines nuits claires de février ou mars et même éventuellement jusqu'au début mai et occasionnent de gros dégâts sur la floraison. [...] Les gelées par évaporation.

Spanish

Campo(s) temático(s)
  • Fenómenos meteorológicos, climáticos y atmosféricos
DEF

Precipitación atmosférica de gotitas de agua en estado de sobrefusión que, al entrar en contacto con una superficie sólida (plantas, hilos telegráficos, etc.), se congelan bruscamente sobre ella y la cubren de una capa de pequeños cristales de hielo.

OBS

escarcha; helada blanca: términos utilizados por la Asociación Mundial de la Carretera.

Save record 2

Record 3 2006-11-29

English

Subject field(s)
  • Atmospheric, Climatic and Meteorological Phenomena
  • Skiing and Snowboarding
CONT

At low temperatures(especially during clear weather) a temperature gradient appears in the snow, bringing about phenomena which render the snow or individual layers more fragile and loosen the bonds between crystals. The snow in these layers is called crusted snow, white frost or liquid snow. It can be recognised by its dryness, and on a slope it flows and looks like crystals of sugar. Layers of compressed snow lying on the fragile layer of white frost may tear off and trigger an avalanche. Dangerous layers of crusted snow are a very frequent phenomenon in cold winters with little snow.

French

Domaine(s)
  • Phénomènes météorologiques, climatiques et atmosphériques
  • Ski et surf des neiges
DEF

Couche de neige dont la surface présente une croûte plus ou moins cassante due au regel, au vent, à la pluie ...

CONT

La neige croûtée est une neige dont la surface comporte une croûte (de regel, de radiation, due au vent, de glace) qui se casse sous les skis et les bloque ou entrave leur mouvement. La «neige cartonnée» est une neige légèrement croûtée.

Spanish

Save record 3

Record 4 2006-01-23

English

Subject field(s)
  • Plant Diseases
CONT

The white birch group has suffered significant population decline over their broad range in North America which has been referred to as birch dieback. The condition and causes are not fully known. Symptoms include a progressive dieback of the twigs and branches, reduced vigor and tolerance of stresses such as caused by insects, diseases, drought, and frost.

French

Domaine(s)
  • Maladies des plantes
CONT

Le bouleau à feuilles cordées est parfois touché par le dépérissement du bouleau qui peut entraîner la mort de l'arbre. On pense que le dépérissement du bouleau résulte d'une combinaison de plusieurs facteurs qui stressent l'arbre à un moment donné.

Spanish

Save record 4

Record 5 2004-09-30

English

Subject field(s)
  • Horse Husbandry
  • Horse Racing and Equestrian Sports
DEF

A rugged saddle horse of a breed developed in western North America that has a mottled skin ... and a blotched or dotted patch of white hair over the rump and loins.

CONT

The symmetric patterns of white are often thought of in connection with the Appaloosa or the Pony of the Americas..., but they appear in a variety of breeds worldwide, from ponies to draught horses. The Appaloosa Horse Club(U. S. established in 1938) recognizes six varieties of patterns :frost, leopard, varnish roan(marble), snowflake, spotted and white blanket.

OBS

The name derives from the Palouse River of Idaho and Washington.

French

Domaine(s)
  • Élevage des chevaux
  • Courses hippiques et sports équestres
DEF

Cheval d'une race américaine spéciale (croupe de couleur claire tachetée, museau rose caractéristique), connu principalement dans les États de l'Ouest.

OBS

L'on utilise parfois ce mot avec une certaine confusion entre un type de robe, comportant des taches blanches pouvant aller jusqu'à constituer le fond de la robe, et la race appaloosa [...]. Ces types de robes apparaissent dans différents endroits du monde, présentement et à différents moments de l'histoire, sur des chevaux de différentes tailles. [...] L'Appaloosa Horse Club (formé en 1938 aux E.U.) reconnaît six types de robes : givrée, léopard, marbrée, neigée (flocon de neige), croupe tachetée et croupe blanche.

Spanish

Campo(s) temático(s)
  • Cría de ganado caballar
  • Carreras de caballos y deportes ecuestres
CONT

Appaloosa [...] Reciben su nombre del río en el que habitaban los indios que desarrollaron la raza, el río Paloosa, una región aún en nuestros días árida y salvaje. [...] Existen seis diferentes de capas: Leopardo [...] Lomo manchado [...] Lomo claro y crines oscuras [...] Copo de nieve [...] A gota [...] Jaspeado [...]

Save record 5

Record 6 2004-05-17

English

Subject field(s)
  • Silviculture
DEF

... longitudinal cracks that occur in the bark and wood often extending several feet up and down and penetrating several inches into the trunks of affected trees.

CONT

The colder the temperature the wider the cracks may open. Sudden drops in temperature do not appear to increase the appearance or width of cracks when compared with slow temperature changes. Soil moisture levels do not appear to affect ’frost cracking’ of previously ’frost crack’ injured trees, while wrapping or painting(using a white latex paint) appear to reduce this problem. In addition, wrapping and painting reduce sunscald, a trunk injury which may lead to frost cracking in future years. ’Frost cracks’ start from old wounds resulting from trunk injury, branch stubs, basal sprouts or root death.

French

Domaine(s)
  • Sylviculture
DEF

Défaut du tronc d'un arbre dont l'écorce et le bois superficiel ont éclaté sous l'action du gel.

Spanish

Campo(s) temático(s)
  • Silvicultura
DEF

Hendedura o grieta profunda en el tronco de un árbol debida a las bajas temperaturas.

Save record 6

Record 7 2000-03-07

English

Subject field(s)
  • Winemaking
CONT

Blue fining... is used to remove excess copper, iron, manganese, and zinc from wines. When properly used it is rapid, effective, leaves no residue and helps to clarify the wine, particularly of excessive protein. It can be used in combination with other finishing agents. It is reported to remove or reduce frost taste, decrease the rate of aging(especially important with white wines), and reduce the bacterial count and the susceptibility of the wine to bacterial activity.

Key term(s)
  • moeslinger fining

French

Domaine(s)
  • Industrie vinicole
CONT

Il est possible d'éliminer complètement le fer, responsable des casses ferriques, en traitant le vin par une dose convenable de ferrocyanure de potassium. Les sels ferriques donnent avec le ferrocyanure de potassium un précipité lourd de ferrocyanure ferrique connu sous le nom de «bleu de Prusse». Ce produit insoluble se dépose rapidement comme une colle. D'où le nom de collage bleu.

Spanish

Save record 7

Record 8 1999-03-16

English

Subject field(s)
  • Meteorology
  • Road Maintenance
DEF

Type of glazed frost(e. g. on roads or the superstructures of ships), caused when water falls on a surface that is below freezing temperature. The thin sheet of ice is rather dark in appearance and, unlike white hoar frost or rime, may be hard to see.

French

Domaine(s)
  • Météorologie
  • Entretien des routes
DEF

Glace très mince et presque invisible qui se forme sur la chaussée par condensation de la vapeur d'eau.

CONT

La glace noire qui se forme sur le tablier des ponts lorsque la température atteint le point de congélation présente de grands risques d'accident.

Spanish

Save record 8

Record 9 1997-01-29

English

Subject field(s)
  • Coins and Bank Notes
  • Numismatics
  • Coining
OBS

cameo contrast: The contrast in appearance between the devices and the fields.

OBS

The "frost" or "frosting" is a matte type surface on the devices of a cameo coin and can range in appearance from white to gray(less white) to silver(no white). The fields of a cameo coin can range from "black"(deep mirror) to silver-appearing(semi-prooflike). The degree of contrast can be subdivided into degrees as "slight", "excellent", and "outstanding". An outstanding contrast is also known as "black and white".

French

Domaine(s)
  • Pièces de monnaie et billets de banque
  • Numismatique
  • Monnayage
OBS

effet-camée : Apparence de certaines pièces en or et en argent de qualité épreuve numismatique sur lesquelles le motif mat et pâle apparaît en net contraste sur le champ poli et foncé.

Spanish

Save record 9

Record 10 1997-01-29

English

Subject field(s)
  • Coins and Bank Notes
  • Numismatics
  • Coining
DEF

The contrast in appearance between the devices and the fields.

OBS

The "frost" or "frosting" is a matte type surface on the devices of a cameo coin and can range in appearance from white to gray(less white) to silver(no white). The fields of a cameo coin can range from "black"(deep mirror) to silver-appearing(semi-prooflike). The degree of contrast can be subdivided into degrees as "slight", "excellent", and "outstanding". An outstanding contrast is also known as "black and white".

OBS

See related term: mirror depth.

French

Domaine(s)
  • Pièces de monnaie et billets de banque
  • Numismatique
  • Monnayage
DEF

Apparence de certaines pièces en or et en argent de qualité épreuve numismatique sur lesquelles le motif mat et pâle apparaît en net contraste sur le champ poli et foncé.

Spanish

Save record 10

Record 11 1997-01-29

English

Subject field(s)
  • Coins and Bank Notes
  • Numismatics
  • Coining
OBS

cameo contrast: The contrast in appearance between the devices and the fields.

OBS

The "frost" or "frosting" is a matte type surface on the devices of a cameo coin and can range in appearance from white to gray(less white) to silver(no white). The fields of a cameo coin can range from "black"(deep mirror) to silver-appearing(semi-prooflike). The degree of contrast can be subdivided into degrees as "slight", "excellent", and "outstanding". An outstanding contrast is also known as "black and white".

French

Domaine(s)
  • Pièces de monnaie et billets de banque
  • Numismatique
  • Monnayage
OBS

effet-camée : Apparence de certaines pièces en or et en argent de qualité épreuve numismatique sur lesquelles le motif mat et pâle apparaît en net contraste sur le champ poli et foncé.

Spanish

Save record 11

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