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Related to osmeteria: Ptilinum


n. pl. os·me·te·ri·a (-tîr′ē-ə)
An eversible organ behind the head of certain caterpillars, containing strong-smelling chemicals that deter predators.

[New Latin osmētērium, from Greek osmē, smell.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n, pl -ria (-rɪə)
(Zoology) zoology a gland in some caterpillars that secretes foul-smelling substances to deter predators
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014