specific gravity: Meaning and Definition of

specif'ic grav'ity

Pronunciation: [key]
— Physics. Physics.
  1. the ratio of the density of any substance to the density of some other substance taken as standard, water being the standard for liquids and solids, and hydrogen or air being the standard for gases. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.