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allotrope

[al-uh-trohp] /ˈæl əˌtroʊp/
noun, Chemistry.
1.
one of two or more existing forms of an element:
Graphite and diamond are allotropes of carbon.
Origin of allotrope
1885-1890
First recorded in 1885-90; allo- + -trope
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for allotrope

allotrope

/ˈæləˌtrəʊp/
noun
1.
any of two or more physical forms in which an element can exist: diamond and graphite are allotropes of carbon
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
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Word Origin and History for allotrope
n.

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

Online Etymology Dictionary, © 2010 Douglas Harper
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allotrope in Medicine

allotrope al·lo·trope (āl'ə-trōp')
n.
A structurally differentiated form of an element that exhibits allotropism.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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allotrope in Science
allotrope
  (āl'ə-trōp')   
Any of several crystalline forms of a chemical element. Charcoal, graphite, and diamond are all allotropes of carbon.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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