ploidy

noun

ploi·​dy ˈplȯi-dē How to pronounce ploidy (audio)
: degree of repetition of the basic number of chromosomes

Examples of ploidy 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.
Induction of experimental cell division to generate cells with reduced chromosome ploidy. Daniella Gray, MSNBC Newsweek, 30 Sep. 2025

Word History

Etymology

from such words as diploidy, hexaploidy

First Known Use

1939, in the meaning defined above

Time Traveler
The first known use of ploidy was in 1939

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Cite this Entry

“Ploidy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ploidy. Accessed 7 Oct. 2025.

Medical Definition

ploidy

noun
ploi·​dy ˈplȯid-ē How to pronounce ploidy (audio)
plural ploidies
: degree of repetition of the basic number of chromosomes

More from Merriam-Webster on ploidy

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