Definition of metastoma in English:

metastoma

(also metastome)

noun

Zoology
  • The labium of a crustacean.

Origin

Mid 19th century; earliest use found in Thomas Huxley (1825–1895), biologist and science educationist. From meta- + stoma.

Pronunciation

metastoma

/ˌmɛtəˈstəʊmə//mɪˈtastəmə/