Definition of gas giant noun from the Oxford Advanced Learner's Dictionary


gas giant

BrE BrE//ˌɡæs ˈdʒaɪənt//
; NAmE NAmE//ˌɡæs ˈdʒaɪənt//
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a large planet made mostly of the gases hydrogen and helium, for example Jupiter or Saturn
See the Oxford Advanced American Dictionary entry: gas giant