Entry 1 sense Webster, 1913 Pleomorphic /plēˌ-əm-ôf'-ĭk/ · Ple·o·mor·phic · IPA /plˌiːəmˈɔfɪk/ 01 a. Pertaining to pleomorphism; as, the pleomorphic character of bacteria. 1. Pertaining to pleomorphism; as, the pleomorphic character of bacteria.