Word.ws English Dictionary

plesiomorphic

Syllables: ple·sio·mor·phicUS/ˌplizioʊˈmɔɹfɪk/

plesiomorphic adjective: sharing a character state with an ancestral clade; primitive.

Adjective

plesiomorphic (comparative more plesiomorphic, superlative most plesiomorphic)

  1. Sharing a character state with an ancestral clade; primitive.
    • [T]he cockroach Polyphaga may represent a condition more plesiomorphic than in other Dictyoptera, but it could as well be paedomorphic, and therefore more derived than in other Dictyoptera [72].2000, Christine A. Nalepa, Claudio Bandi, “Paedomorphosis and Termite Evolution”, in Termites: Evolution, Sociality, Symbioses, Ecology, →ISBN, page 68
    • "The cranium is clearly plesiomorphic in overall form, presenting primitive traits shared by earlier hominins," the authors wrote.2025 September 27, Julia Jacobo, “Million-year-old skull could rewrite timeline of human origin, researchers say”, in ABC News, archived from the original on 14 Feb 2026
  2. Plesiomorphous.

Synonyms of plesiomorphic

Forms of plesiomorphic

comparativemore plesiomorphic
superlativemost plesiomorphic

Origin of plesiomorphic

From plesiomorph + -ic or plesio- + -morphic.

Words formed from plesiomorphic

Questions about plesiomorphic

What does plesiomorphic mean?
Plesiomorphic means sharing a character state with an ancestral clade; primitive.
What part of speech is plesiomorphic?
Plesiomorphic is an adjective.
How do you pronounce plesiomorphic?
Plesiomorphic is pronounced /ˌplizioʊˈmɔɹfɪk/ (US).

Words near plesiomorphic in the dictionary

  1. plesiochronous
  2. plesiohedra
  3. plesiohedron
  4. plesiometacarpal
  5. plesiomorph
  6. plesiomorphic
  7. plesiomorphically
  8. plesiomorphies
  9. plesiomorphism
  10. plesiomorphous
  11. plesiomorphs

Source and license

Adapted from Wiktionary: plesiomorphic (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “plesiomorphic.” Word.ws, https://word.ws/plesiomorphic. Based on Wiktionary, CC BY-SA 4.0.