osmeterium

noun
os·​me·​te·​ri·​um | \ˌäz-mə-ˈtir-ē-əm \
plural osmeteria\ ˌäz-​mə-​ˈtir-​ē-​ə \

Definition of osmeterium 

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

First Known Use of osmeterium

1817, in the meaning defined above

History and Etymology for osmeterium

New Latin, irregular from Greek osmē odor

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Dictionary Entries near osmeterium

Osmeridae

Osmerus

osmesis

osmeterium

Osmia

osmic

osmic acid

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The first known use of osmeterium was in 1817

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