A clathrate compound formed by a gas and ice under conditions of high pressure and/or low temperature; (Geology) such a compound of methane and ice occurring in permafrost, marine sediments, etc.
Origin
Late 19th century. Compare French hydrate de gaz.
Definition of gas hydrate in US English:
gas hydrate
noun
Chemistry
A clathrate compound formed by a gas and ice under conditions of high pressure and/or low temperature; (Geology) such a compound of methane and ice occurring in permafrost, marine sediments, etc.