cladistics

1 of 2

noun (1)

cla·​dis·​tics klə-ˈdi-stiks How to pronounce cladistics (audio)
kla-
plural in form but singular in construction
: a system of biological taxonomy that defines taxa uniquely by shared characteristics not found in ancestral groups and uses inferred evolutionary relationships to arrange taxa in a branching hierarchy such that all members of a given taxon have the same ancestors
cladist noun
cladistic adjective
cladistically adverb

cladist

2 of 2

noun (2)

cla·​dist ˈkla-dist How to pronounce cladist (audio)
ˈklā-
plural -s
: a taxonomist who adheres to the cladistic system of classification

Word History

Etymology

Noun (1)

clade + -ist(ic) + -ics

First Known Use

Noun (1)

1965, in the meaning defined above

Time Traveler
The first known use of cladistics was in 1965

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Cite this Entry

“Cladistics.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cladistics. Accessed 22 Jun. 2026.

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