: a polyploid state in which the chromosomes have divided repeatedly without subsequent division of the nucleus or cell

Word History

First Known Use

1945, in the meaning defined above

Time Traveler
The first known use of endopolyploidy was in 1945

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Cite this Entry

“Endopolyploidy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/endopolyploidy. Accessed 7 Jul. 2026.

Medical Definition

endopolyploidy

noun
plural endopolyploidies
: a polyploid state in which the chromosomes have divided repeatedly without subsequent division of the nucleus or cell
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