From Longman Dictionary of Contemporary Englishspecific gravityspeˌcific ˈgravity noun [countable, uncountable] technical HPTEMthe weight of a substance divided by the weight of the amount of water that would fill the same space
Examples from the Corpus
specific gravity• A minor, but important constituent of many sandstones are the heavy minerals, with a specific gravity in excess of 2.9.• Haulm destruction is carried out to stop the specific gravity from getting too high.• The specific gravity is measured by Archimedes' principle. 