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

Origin of isochore

iso- + -chor < Greek chṓra place, land
Related formsi·so·chor·ic [ahy-suh-kawr-ik, -kor-] /ˌaɪ səˈkɔr ɪk, -ˈkɒr-/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for isochor



  1. a line on a graph showing the variation of the temperature of a fluid with its pressure, when the volume is kept constant
Derived Formsisochoric, adjective

Word Origin for isochor

C19: from iso- + Greek khōros place, space
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