: of or relating to a single stock
specifically : developed from a single common ancestral form

Word History

Etymology

International Scientific Vocabulary

First Known Use

1874, in the meaning defined above

Time Traveler
The first known use of monophyletic was in 1874

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Cite this Entry

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

Medical Definition

monophyletic

adjective
: of, relating to, or derived from a single stock
specifically : descending from a single common ancestral form
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