pentaploid

adjective

pen·​ta·​ploid ˈpen-tə-ˌplȯid How to pronounce pentaploid (audio)
: having or being a chromosome number that is five times the basic number
pentaploid noun
pentaploidy
ˈpen-tə-ˌplȯi-dē How to pronounce pentaploid (audio)
noun

Word History

First Known Use

1921, in the meaning defined above

Time Traveler
The first known use of pentaploid was in 1921

Rhymes for pentaploid

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Browse Nearby Words

Pentaphylax
pentaploid
pentapody
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Cite this Entry

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

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Medical Definition

pentaploid

1 of 2 adjective
pen·​ta·​ploid ˈpen-tə-ˌplȯid How to pronounce pentaploid (audio)
: having or being a chromosome number that is five times the basic number
pentaploidy
ˈpent-ə-ˌplȯid-ē How to pronounce pentaploid (audio)
noun
plural pentaploidies

pentaploid

2 of 2 noun
: a pentaploid individual
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