specific gravity

[ spi-sif-ik grav-i-tee ]

nounPhysics.
  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.

Origin of specific gravity

1
First recorded in 1660–70; the variant relative density was first recorded in 1875–80
  • Also called rel·a·tive den·si·ty [rel-uh-tiv den-si-tee] /ˈrɛl ə tɪv ˈdɛn sɪ ti/ .

Words Nearby specific gravity

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How to use specific gravity in a sentence

British Dictionary definitions for specific gravity

specific gravity

noun
  1. the ratio of the density of a substance to that of water: See relative density

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

Scientific definitions for specific gravity

specific gravity

[ spĭ-sĭfĭk ]


  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.

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

Cultural definitions for specific gravity

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.

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.