osmeterium

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

noun, plural os·me·te·ri·a [oz-mi-teer-ee-uh] /ˌɒz mɪˈtɪər i ə/.

a glandular process on the first thoracic segment of many caterpillars that emits a noxious odor to ward off predators.

Words nearby osmeterium