a gas hydrate

(physics) a hypothetical gas, whose molecules exhibit no interaction, and undergo elastic collision with each other and with the walls of the container

A covering for the face with a filter to protect the user from poison gas.

(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

(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.