trip·loid
ˈtri-ˌplȯid 
: having or being a chromosome number three times the monoploid number
triploid
noun
trip·loi·dy
ˈtriˌplȯidē
plural -es
: the state of being triploid
triploidy in higher animals is not common—
H. P. Riley
H. P. RileyExamples of triploid in a Sentence
Recent Examples on the Web
Joshua Siskin, Oc Register, 7 May 2026
Andrew Dittman, a research fisheries biologist for Northwest Fisheries Science Center, said using triploid fish was a common and largely effective process for maintaining a sterile population.
—Author: Evan Bush, Anchorage Daily News, 1 Nov. 2019
Triploid chromosomes can replicate for normal growth, but can’t make sperm or eggs3.
—Nick Stockton, WIRED, 20 Nov. 2015
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Adjective
The resulting plants produce fruit whose triploid seeds are then planted to yield seedless watermelons.
—Joshua Siskin, Oc Register, 7 May 2026
Andrew Dittman, a research fisheries biologist for Northwest Fisheries Science Center, said using triploid fish was a common and largely effective process for maintaining a sterile population.
—Author: Evan Bush, Anchorage Daily News, 1 Nov. 2019
Triploid chromosomes can replicate for normal growth, but can’t make sperm or eggs3.
—Nick Stockton, WIRED, 20 Nov. 2015
Cite this Entry
“Triploid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/triploid. Accessed 21 Jun. 2026.
Copy CitationMedical Definition
triploid
1 of 2 adjective
trip·loid
ˈtrip-ˌlȯid
: having or being a chromosome number three times the monoploid number
triploid
2 of 2 noun
: a triploid individual
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