More information A user suggests that this English entry be moved, merged or split, giving the reason: “misspelling of plesiomorph”. ... A user suggests that this English entry be moved, merged or split, giving the reason: “misspelling of plesiomorph”. Please see the discussion on Requests for moves, mergers and splits(+) for more information and remove this template after the request has been fulfilled. Close Remove adsEnglish Etymology From plesio- + -morph. Noun pleisiomorph (plural pleisiomorphs) A characteristic of an organism that has been acquired from its ancestors. Antonym: apomorph Derived terms plesiomorphicplesiomorphismplesiomorphyWikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads