adjective Biology.

  1. serving as a sign or warning of danger, as the conspicuous colors or markings of certain poisonous animals.


  1. (of the conspicuous coloration of certain animals) acting as a warning, esp to potential predators

adj.“significant, indicative,” 1890, from Greek semat-, comb. form of sema (genitive sematos) “sign” (see semantic) + -ic. Used especially in biology, in reference to “warning” colors, etc.

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