zero gravity

noun
🔊/ˌzɪərəʊ ˈɡrævəti/
🔊/ˌzɪrəʊ ˈɡrævəti/
[uncountable]
(abbreviation zero G)
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  1. a state in which there is no gravity, or where gravity has no effect, for example in space(太空等的)零重力状态,失重状态