(underwater diving) A mixture of gases used for respiration in breathing equipment, typically in scuba diving.

A chemically inert gas used as the mobile phase in gas chromatography

Any nonreactive gas that is used to fill containers of perishable produce, tyres etc

(physics) A tall, slim centrifuge that is used to separate gases containing different isotopes

A poisonous gas. / (military) Any poisonous gas used as a chemical weapon.

coal gas, especially when used for domestic lighting

A pipe or hose connecting a gas appliance to the main supply of natural gas for the apartment, office or building.

plural of gas line

(colloquial) hydrogen sulfide

(physics) The part of fluid dynamics concerning gases