Meaning of “specific gravity” in the English Dictionary

british dictionary

"specific gravity" in British English

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specific gravitynoun [ U ]

uk /spəˌsɪf.ɪk ˈɡræv.ɪ.ti/ us /spəˌsɪf.ɪk ˈɡræv.ə.t̬i/ specialized

the mass of a particular volume of a substance when compared with the mass of an equal volume of water at 4°C. A more modern name for this is relative density.

(Definition of “specific gravity” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)