aposematism

noun

ap·​o·​sem·​a·​tism ˌa-pə-ˈse-mə-ˌti-zəm 

zoology

: the use of a signal and especially a visual signal of conspicuous markings or bright colors by an animal to warn predators that it is toxic or distasteful : warning coloration

Ladybugs are a good example of aposematism, when the bright colors of red, orange, yellow and black serve as a defense mechanism that warns potential predators of past poisonous or unappetizing results.

—Carol Coogan, Times Union (Albany, New York), 16 June 2008

Word History

Etymology

aposemat(ic) + -ism

First Known Use

1979, in the meaning defined above

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