allotropy

or al·lot·ro·pism

[ uh-lo-truh-pee ]
/ əˈlɒ trə pi /
|

noun Chemistry.

a property of certain elements, as carbon, sulfur, and phosphorus, of existing in two or more distinct forms; allomorphism.

Origin of allotropy

First recorded in 1840–50; allo- + -tropy
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for allotropy

allotropy

allotropism

/ (əˈlɒtrəpɪ) /

noun

the existence of an element in two or more physical forms. The most common elements having this property are carbon, sulphur, and phosphorus
Derived Formsallotropic (ˌæləˈtrɒpɪk), adjectiveallotropically, adverb
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