episematicPronunciation: /ˌɛpɪsɪˈmatɪk/Definition of episematic adjective Zoology (of coloration or markings) serving to help recognition by animals of other individuals of the same species. Origin: late 19th century: from epi- 'upon' + Greek sēma 'sign' + -aticepisematic in other Oxford dictionaries Definition of episematic in the US English dictionary