| 单词 | specific gravity |
| 释义 | > as lemmasspecific gravity specific gravity n. The degree of relative heaviness characteristic of any kind or portion of matter; commonly expressed by the ratio of the weight of a given volume to that of an equal volume of some substance taken as a standard (viz. usually water for liquids and solids, and air for gases). Abbreviated sp. gr.Since the weights of bodies are proportional to their masses, their specific gravities are in the same ratio as their densities; and in some scientific books the term density has displaced specific gravity.extracted from gravityn.< as lemmas |
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