Carbon dioxide

Carbon dioxide

Commonly called CO2, an odorless, tasteless gas that is a byproduct of metabolism; is excreted by the lungs in exhaled air.

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Industry/Domain: Sports
Category: Scuba diving
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carbon dioxide

Chemistry; Inorganic chemistry

CO 2 A colorless, odorless, tasteless gas about 1.5 times as dense as air.

carbon dioxide

Astronomy; Mars

A gas used by all green plants and recycled by them to form wood and the oxygen we breathe. In very large quantities it can be poisonous to animal life.

carbon dioxide

Earth science; Physical oceanography

This is the most important of the greenhouse gases with an atmospheric concentration of 353 ppm (in 1990), up from an estimated 260-290 in pre-industrial times (pre-1880). This ...

carbon dioxide

Health care; Heart disease

A gas created during metabolism, when the cells use oxygen to burn fat and release energy. The lungs release carbon dioxide when you breathe out.

carbon dioxide

Astronomy; Planetary science

A compound formed by combining one carbon atom with two oxygen atoms, making the molecule CO 2 . Carbon dioxide is an important part of the atmospheres of Venus and Mars. Carbon ...

carbon dioxide

Fishing; Fish processing

Colourless gas, heavier than air, having a slight smell and used in liquid or in solid form (dry ice) as a refrigerant. Dry ice sublimes at a temperature of -78°C and may be used ...

immersion hypothermia

Sports; Scuba diving

The lowering of body temperature when a diver is fully immersed in cold water without proper thermal protection.

hookah

Sports; Scuba diving

A surface-supplied compressed air apparatus, for use in shallow diving in calm waters. The air is delivered to one or more divers through a long hose.

rebreather

Sports; Scuba diving

A closed-circuit system which filters exhaled air, then recirculates it for rebreathing by the diver; requires special training and maintenance.

high pressure nervous syndrome (HPNS)

Sports; Scuba diving

A condition which results from breathing Helium under high pressures. Early symptoms of HPNS are sometimes seen as shallow as 300FSW but more commonly over 600FSW. The severity ...

breath-hold diving

Sports; Scuba diving

Diving without life support apparatus, while holding one's breath.

windward

Sports; Scuba diving

A point or side from which the wind blows; in the direction from which the wind blows; as opposed to, leeward.

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Industry/Domain: Fruits & vegetables Category: Exotic fruit

Kiss apple

Ping-pong ball-sized apple that is specially produced for freshening breath naturally. A kiss apple is tiny enough to be stashed in a pocket or purse ...