Osmeterium


[oz-mi-teer-ee-uh m] /ˌɒz mɪˈtɪər i əm/

noun, plural osmeteria [oz-mi-teer-ee-uh] /ˌɒz mɪˈtɪər i ə/ (Show IPA)
1.
a glandular process on the first thoracic segment of many caterpillars that emits a noxious odor to ward off predators.

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