Definition of monothalamous in English:

monothalamous

Pronunciation /ˌmɒnə(ʊ)ˈθaləməs/

adjective

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

  • 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.