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

(obsolete, chemistry) hydrogen

(transitive, US, slang) To refuel (a vehicle). / (transitive, slang) To inflate (someone's ego).

A cylindrical vessel capable of containing a compressed gas at high pressure.

the normal form of molecular oxygen, especially such a gas supplied industrially in cylinders

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

(idiomatic) Functioning particularly effectively; achieving something substantial. / Used other than figuratively or idiomatically: see cook, with, gas.

The conduit through which coal gas or natural gas is conveyed to users.

(petrochemistry) The poisonous gas, used domestically for cooking etc and formerly for lighting, prepared by heating coal with steam; it is a mixture of hydrogen and carbon monoxide; synthesis gas or town gas.

(petrochemistry) The gas obtained by heating coal and steam; coal gas.