Physics.. Also, isochor. Also called isometric, isometric line. for a given substance, a curve graphing temperature against pressure, when the volume of the substance is held constant.
Genetics. a large stretch of DNA with a high degree of uniformity in its base pairs.

iso- + -chor < Greek chṓra place, land

isochoric [ahy-suh-kawr-ik, -kor-] , adjective Unabridged


adjective Also, isometrical.
of, pertaining to, or having equality of measure.
of or pertaining to isometric exercise.
Crystallography. noting or pertaining to that system of crystallization that is characterized by three equal axes at right angles to one another. Compare crystal system.
Prosody. of equal measure; made up of regular feet.
Drafting. designating a method of projection (isometric projection) in which a three-dimensional object is represented by a drawing (i·somet·ric draw·ing) having the horizontal edges of the object drawn usually at a 30° angle and all verticals projected perpendicularly from a horizontal base, all lines being drawn to scale. Compare orthographic projection.
isometrics, isometric exercise ( def 1 ).
an isometric drawing.
Also called isometric line. Physics. isochore ( def 1 ).

1830–40; < Greek isometr(ía) isometry + -ic

isometrically, adverb
pseudoisometric, adjective
unisometrical, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
isometric (ˌaɪsəʊˈmɛtrɪk)
1.  having equal dimensions or measurements
2.  physiol of or relating to muscular contraction that does not produce shortening of the muscle
3.  (of a crystal or system of crystallization) having three mutually perpendicular equal axes
4.  crystallog another word for cubic
5.  prosody having or made up of regular feet
6.  (of a method of projecting a drawing in three dimensions) having the three axes equally inclined and all lines drawn to scale
7.  Also called: isometric drawing a drawing made in this way
8.  Also called: isometric line a line on a graph showing variations of pressure with temperature at constant volume
[C19: from Greek isometria (see iso- + -metry) + -ic]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

1840, coined from Gk. isos "equal" + metron "measure" (see meter (2)). Originally a method of using perspective in drawing; the physiological sense relating to muscular action is from 1891, borrowed from Ger. isometrisch (1882). Isomer is an 1866 back-formation; isometrics coined 1962 in Amer.Eng.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

isometric i·so·met·ric (ī'sə-mět'rĭk)

  1. Of or exhibiting equality in dimensions or measurements.

  2. Of, relating to, or being a crystal system of three equal axes lying at right angles to each other.

  3. Of or involving muscular contraction against resistance in which the length of the muscle remains the same.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
isometric   (ī'sə-mět'rĭk)  Pronunciation Key 
  1. See cubic.

  2. Of or involving muscular contraction against resistance in which the length of the muscle remains the same.

  3. A graph showing the relationship between two quantities, such as pressure and temperature, when a third quantity, such as volume, is held constant.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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