noun, plural os·me·te·ri·a [oz-mi-teer-ee-uh] /ˌɒz mɪˈtɪər i ə/.
- a glandular process on the first thoracic segment of many caterpillars that emits a noxious odor to ward off predators.
noun, plural os·me·te·ri·a [oz-mi-teer-ee-uh] /ˌɒz mɪˈtɪər i ə/.