• synonyms

specific gravity

noun 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.
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Origin of specific gravity

First recorded in 1660–70
Also called relative density.
Related formsspe·cif·ic-grav·i·ty, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for specific gravity

Historical Examples

  • Separate samples are then weighed out for mortar briquettes, for soundness pats, and for the specific-gravity and fineness tests.

    Transactions of the American Society of Civil Engineers, vol. LXX, Dec. 1910

    Herbert M. Wilson

  • The charge should be continued until five consecutive, specific-gravity readings are practically the same.

British Dictionary definitions for specific gravity

specific gravity

  1. the ratio of the density of a substance to that of waterSee relative density
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

specific gravity in Medicine

specific gravity

  1. 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.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

specific gravity in Science

specific gravity

  1. 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 American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

specific gravity in Culture

specific gravity

The mass of a substance, given as a multiple of the mass of the same volume of a standard substance (usually water). The specific gravity of aluminum is 2.70; hence, a cubic foot of aluminum weighs 2.70 times as much as a cubic foot of water.

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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.