relative density

noun

, Physics.

1. specific gravity.

relative density

noun

1. the ratio of the density of a substance to the density of a standard substance under specified conditions. For liquids and solids the standard is usually water at 4°C or some other specified temperature. For gases the standard is often air or hydrogen at the same temperature and pressure as the substance d See also specific gravity vapour density

relative density

1. The ratio of the density of one substance to that of a reference substance, typically water.
2. See more at specific gravity

Word History and Origins

Origin of relative density¹

First recorded in 1875–80;