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See more synonyms for allotrope on Thesaurus.com
noun Chemistry.
  1. one of two or more existing forms of an element: Graphite and diamond are allotropes of carbon.
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Origin of allotrope

First recorded in 1885–90; allo- + -trope
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for allotrope


  1. any of two or more physical forms in which an element can existdiamond and graphite are allotropes of carbon
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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 allotrope


1847, back-formation from allotropy "variation of physical properties without change of substance," from allo- + -tropy "manner" (see -trope). Related: Allotropic.

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Online Etymology Dictionary, © 2010 Douglas Harper

allotrope in Medicine


  1. A structurally differentiated form of an element that exhibits allotropism.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

allotrope in Science


  1. Any of several crystalline forms of a chemical element. Charcoal, graphite, and diamond are all allotropes of carbon.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.