TERMIUM Plus®

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

PURE AIR [2 records]

Record 1 2012-02-22

English

Subject field(s)
  • Atmospheric Physics
  • Air Pollution
DEF

Air (relatively) devoid of solid, liquid or gaseous pollutant materials.

CONT

The composition of air is variable with respect to several of its components (e.g., CH4, CO2, H2O) so "pure" air has no precise meaning; it is commonly considered to be air which is free of dust, [hydrometeors,] aerosols, and reactive gaseous contaminants of anthropogenic origin [such as industrial effluents]. ... Relative clean air which is free of most reactive anthropogenic pollution (NO, NO2, SO2, non-methane hydrocarbons, etc.), often used as a reference sample in the calibration and operation of instruments, is purchased under the designation of zero air.

CONT

[The] so-called "pure" air is a mixture of gases containing about 78 percent nitrogen; 21 percent oxygen; less than 1 percent of carbon dioxide, argon, and other inert gases; and varying amounts of water vapor.

OBS

air: The mixture of gases comprising the earth's atmosphere.

French

Domaine(s)
  • Physique de l'atmosphère
  • Pollution de l'air
DEF

Air (relativement) exempt de matières polluantes solides, liquides ou gazeuses.

CONT

L'air est un mélange de gaz constituant l'atmosphère qui entoure la terre. L'air pur est composé de 21 % d'oxygène et de 78 % d'azote par volume, en plus de quantités infimes d'autres gaz comme l'argon, le gaz carbonique et la vapeur d'eau.

Spanish

Campo(s) temático(s)
  • Física de la atmósfera
  • Contaminación del aire
DEF

Aire (relativamente) exento de materiales contaminantes sólidos, líquidos o gaseosos.

Save record 1

Record 2 2005-02-24

English

Subject field(s)
  • Atmospheric Physics

French

Domaine(s)
  • Physique de l'atmosphère
DEF

Air qui ne forme aucun voile sur le paysage jusqu'à une distance de 10 km au moins.

Spanish

Save record 2

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