aposematic Syllabification: (ap·o·se·mat·ic)Pronunciation: /ˌapəsiˈmatik/Definition of aposematic adjective Zoology (of coloration or markings) serving to warn or repel predators. (of an animal) having aposematic coloration or markings. Derivatives aposematismPronunciation: /ˌapəˈsēməˌtizəm/ noun aposematic in other Oxford dictionaries Definition of aposematic in the British & World English dictionary