osmeterium


os·me·te·ri·um

noun \ˌäz-mə-ˈtir-ē-əm\
plural os·me·te·ria\-ē-ə\

Definition of OSMETERIUM

:  a protrusible glandular process of swallowtail larvae that emits a disagreeable odor for defensive purposes

Origin of OSMETERIUM

New Latin, irregular from Greek osmē odor
First Known Use: 1816

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