polymorph

noun

poly·​morph ˈpä-lē-ˌmȯrf How to pronounce polymorph (audio)
1
: a polymorphic organism
also : one of the several forms of such an organism
2
: any of the crystalline forms of a polymorphic substance

Examples of polymorph in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Cocoa butter is made of fat molecules that can arrange themselves in six different crystal shapes (which chemists call ‘polymorphs’). Clarissa Brincat, Popular Science, 21 Jan. 2026

Word History

Etymology

International Scientific Vocabulary

First Known Use

circa 1828, in the meaning defined at sense 1

Time Traveler
The first known use of polymorph was circa 1828

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Cite this Entry

“Polymorph.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/polymorph. Accessed 25 Jan. 2026.

Medical Definition

polymorph

noun
poly·​morph ˈpäl-i-ˌmȯrf How to pronounce polymorph (audio)
1
: a polymorphic organism
also : one of the several forms of such an organism
2
: any of the crystalline forms of a polymorphic substance
3

More from Merriam-Webster on polymorph

Last Updated: - Updated example sentences
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