Definition of monothalamous in US English:

monothalamous

adjective

  • 1Entomology. Of a plant gall: having only one chamber. rare.

  • 2Zoology. Of an animal or protist: having a shell, test, or skeleton with a single chamber.

Origin

Early 19th century; earliest use found in William Kirby (1759–1850), entomologist and naturalist. From mono- + scientific Latin thalamus or its etymon ancient Greek θάλαμος inner chamber + -ous. In sense 2 after French monothalame.

Pronunciation

monothalamous

/ˌmɒnə(ʊ)ˈθaləməs/