(of the coloration of certain distasteful or poisonous animals) characterized by bright conspicuous markings, which predators recognize and learn to avoid; warning
Word origin
C19: from apo- + Greek sēma sign
aposematic in American English
(ˌæpoʊsɪˈmætɪk; ˌ æpəsɪˈmætɪk)
adjective
Zoology
serving to warn off potential attackers: said of an animal's warning coloration