allotropism

[ ə-lŏtrə-pĭz′əm ]

n.

The existence of two or more forms of an element that differ from one another in crystalline or molecular structure.

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

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