A sealed chamber in which people are executed with poison gas.

Any gas, such as carbon dioxide or CFCs, that contributes to the greenhouse effect when released into the atmosphere.

(petrochemistry) A poisonous manufactured gas, supplied to domestic consumers for heating, cooking and (formerly) lighting; it is a mixture of carbon monoxide and hydrogen formed by the reaction of coke with steam - C + H₂O => CO + H₂.

(US, slang) hydrogen cyanide, used in the gas chamber

(physics) a universal constant, R, that appears in the ideal gas law, PV=nRT, derived from two fundamental constants, the Boltzmann constant and Avogadro's number, R=N_Ak.

(chiefly Britain) Any of the measurements on a scale of temperatures in domestic gas cookers.

(Canada, US) A device at a gas station that dispenses gasoline.

A vesicant gas, bis (2-chloroethyl) sulfide, (ClC₂H₄)₂S, once used in chemical warfare.

(obsolete, chemistry) hydrogen

Any gas used to provide a modified atmosphere for a product.