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  1. variant of -tropy.
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Origin of -tropism

see origin at -tropy, -ism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for -tropism



n combining form
  1. indicating a tendency to turn or develop in response to a certain stimulusphototropism
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Word Origin

from Greek tropos a turn
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

-tropism in Medicine


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