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IMPERIAL UNIT [8 records]

Record 1 2025-11-17

English

Subject field(s)
  • Metrology and Units of Measure
  • Surveying
CONT

The rod, perch, or pole... is a... and unit of length of various historical definitions. In British imperial and US customary units, it is defined as 16 1⁄2 feet, equal to exactly 1⁄320 of a mile, or 5 1⁄2 yards(a quarter of a surveyor's chain), and is exactly 5. 0292 meters. The rod is useful as a unit of length because integer multiples of it can form one acre of square measure(area). The "perfect acre" is a rectangular area of 43, 560 square feet, bounded by sides 660 feet(a furlong) long and 66 feet(a chain) wide(220 yards by 22 yards) or, equivalently, 40 rods by 4 rods. An acre is therefore 160 square rods or 10 square chains.

French

Domaine(s)
  • Unités de mesure et métrologie
  • Arpentage
CONT

En pratique, on compte 0,304 800 m pour le pied depuis le XIXe siècle [...] Cela donne un yard de trois pieds à 0,9144 m et une perche de 16 ½ pieds mesurant 5,0292 m. Une acre de 160 perches carrées couvre ainsi 4 046,8564 m [carrées].

Spanish

Save record 1

Record 2 2016-02-25

English

Subject field(s)
  • Metrology and Units of Measure
DEF

Imperial unit of energy(ft-lb), defined as the work done when a force of one pound moves through a distance of one foot. Superseded by the joule. One foot-pound equals 1. 356 joule.

CONT

Torque is measured in foot-pounds, joules, meter-kilograms, etc.

OBS

The metric equivalent is centimeter-kilogram, or, in international SI metric units, the joule.

OBS

foot-pound: term officially approved by CP Rail.

French

Domaine(s)
  • Unités de mesure et métrologie
OBS

(couple de serrage).

OBS

pied-livre : terme uniformisé par CP Rail.

Key term(s)
  • pi-lb

Spanish

Save record 2

Record 3 2012-07-25

English

Subject field(s)
  • Audiovisual Techniques and Equipment
  • Audio Technology
DEF

In recording, a device that indicates the length of tape that has passed over the magnetic heads.

OBS

The lexicalized unit "tape footage counter" is used in the imperial system of weights and measures.

French

Domaine(s)
  • Audiovisuel (techniques et équipement)
  • Électroacoustique
CONT

Le compteur de défilement de bande [...] offre une précision voisine de celle des vidéodisques, où la recherche peut se faire image par image.

OBS

Ne pas confondre avec le «compte-tours» qui calcule seulement le nombre de révolutions de la bobine débitrice et qui reste par conséquent d'une précision relative.

OBS

Le terme «compteur métrique» ne peut s'employer qu'en système international.

Spanish

Save record 3

Record 4 2007-10-25

English

Subject field(s)
  • Electromagnetic Radiation
DEF

The speed at which light and other magnetic waves travel through empty space.

CONT

The velocity of light is 2.9979 x 108 m/s.

CONT

The speed of light in a vacuum is an important physical constant denoted by the letter c for "constant" or the Latin word "celeritas" meaning "swiftness". It is the speed of all electromagnetic radiations, including visible light, in a vacuum. More generally, it is the speed of anything having zero rest mass.... In metric units, the speed of light is exactly 299, 792, 458 metres per second(1, 079, 252, 848. 8 km/h). The fundamental SI unit of length, the metre, has been defined since October 21, 1983, as the distance light travels in a vacuum in 1/299, 792, 458 of a second; any increase in the precision of the measurement of the speed of light would refine the definition of the metre, but not alter the numerical value of c. The approximate value of 3x108 m/s is commonly used in rough estimates. In imperial units, the speed of light is about 670, 616, 629. 2 miles per hour or 983, 571, 056 feet per second, which is about 186, 282, 397 miles per second, or roughly one foot per nanosecond. The speed of light when it passes through a transparent or translucent material medium, like glass or air, is slower than its speed in a vacuum. The ratio of c to the observed phase velocity is called the refractive index of the medium.

French

Domaine(s)
  • Rayonnements électromagnétiques
DEF

Vitesse de propagation de la lumière dans le vide.

CONT

La vitesse de la lumière est 2.9979 x 108 m/s.

Spanish

Save record 4

Record 5 2004-01-22

English

Subject field(s)
  • Metrology and Units of Measure
DEF

A unit for measuring liquids, equal to one sixtieth of a fluid dram. The minim is the smallest unit in the imperial system of liquid measure.

OBS

... about 1 drop (of water).

French

Domaine(s)
  • Unités de mesure et métrologie
DEF

Très petite quantité de liquide qui prend une forme arrondie.

Spanish

Campo(s) temático(s)
  • Metrología y unidades de medida
Save record 5

Record 6 2003-10-23

English

Subject field(s)
  • Metrology and Units of Measure
DEF

A unit of measurement historically used in the United Kingdom and other English-speaking countries. Units include inch, foot, yard, mile, acre, ounce, pound, stone, ton, pint, quart and gallon.

OBS

Now largely replaced by metric units.

French

Domaine(s)
  • Unités de mesure et métrologie
CONT

Principales unités de mesure anglo-saxonnes. longueur : [...] pouce, pied [...] masse-avoir-du-poids (commerce) : once, livre, [...] capacité : gallon britannique [...]

Spanish

Save record 6

Record 7 1996-11-08

English

Subject field(s)
  • Small Arms
DEF

Imperial unit of weight which equals 1/16 of an ounce. Once widely used with black powder charges.

OBS

Term and definition officialized by the Small Arms Terminology Working Group.

Key term(s)
  • DM

French

Domaine(s)
  • Armes légères
DEF

Unité de poids anglo-saxonne valant 1/16 d'once. Elle a déjà beaucoup servi pour les charges de poudre noire.

OBS

Terme et définition uniformisés par le Groupe de travail de terminologie des armes légères.

Spanish

Save record 7

Record 8 1985-08-15

English

Subject field(s)
  • Metrology and Units of Measure
DEF

A British unit equal to 0. 25 imperial pint or 8. 669 cubic inches. [142. 066 cubic centimeters]

DEF

a U.S. liquid unit equal to 0.25 U.S. liquid pint or 7.218 cubic inches [118.291 millimeters]

French

Domaine(s)
  • Unités de mesure et métrologie
DEF

Mesure de capacité, employée en Angleterre avec la valeur 0.142 litre et aux États-Unis avec la valeur 0.118 litre.

DEF

Mesure pour les liquides, valant un huitième de pinte et aujourd'hui, un huitième de litre [mesure approximative].

Spanish

Save record 8

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