- 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.
Origin of specific gravity
First recorded in 1660–70
Also called relative density.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for specific gravity
Separate samples are then weighed out for mortar briquettes, for soundness pats, and for the specific-gravity and fineness tests.
The charge should be continued until five consecutive, specific-gravity readings are practically the same.Cyclopedia of Telephony and Telegraphy, Vol. 2
- the ratio of the density of a substance to that of waterSee relative density
- The ratio of the mass of a solid or liquid to the mass of an equal volume of distilled water at 4°C (39°F) or of a gas to an equal volume of air or hydrogen under prescribed conditions of temperature and pressure.
- The relative density of a solid or liquid, usually when measured at a temperature of 20°C, compared with the maximum density of water (at 4°C). For example, the specific gravity of carbon steel is 7.8, that of lead is 11.34, and that of pure gold is 19.32.
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The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.