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osmeterium

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noun os·me·te·ri·um \ˌäz-mə-ˈtir-ē-əm\

Definition of osmeterium

plural osmeteriaplay \-ē-ə\

  1. :  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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expressing little or no emotion

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