from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An eversible glandular sac on the first thoracic segment of many caterpillars that secretes an unpleasant-smelling substance to ward off predators.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. One of a pair of scent organs in the larvae of certain swallowtail butterflies.
from The Century Dictionary and Cyclopedia
- n. In entomology, any organ devoted to the production of a scent or odor; specifically, a forked process found on the first segment behind the head of certain butterfly-larvæ.
New Latin osmētērium, from Greek osmē, smell.(American Heritage® Dictionary of the English Language, Fourth Edition)
New Latin, from Ancient Greek ὀσμή (osmē, "smell"), ὀσμητός (osmētos, "smelled"). (Wiktionary)