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noun Cell Biology.
  1. the period of the cell cycle during which the nucleus is not undergoing division, typically occurring between mitotic or meiotic divisions.Also called interkinesis.Compare G1 phase, S phase, G2 phase.

Origin of interphase

First recorded in 1920–25; inter- + phase
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for interphase


  1. biology the period between two successive divisions of a cell
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

Word Origin and History for interphase


1913, from German interphase (1912); see inter- + phase.

Online Etymology Dictionary, © 2010 Douglas Harper

interphase in Medicine


  1. The stage of a cell between two successive mitotic or meiotic divisions.interkinesis
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

interphase in Science


  1. The stage in the development of a cell following mitosis or meiosis, during which the nucleus is not dividing. In cells that will undergo further division, the DNA in the nucleus is duplicated in preparation for the next division.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.