Definition of cryptostoma in English:

cryptostoma

Pronunciation /ˌkrɪptə(ʊ)ˈstəʊmə/

noun

rare Botany
  • A small circular depression containing finely septate hairs found on the surface of some seaweeds, especially those of the order Fucales.

Origin

Mid 19th century; earliest use found in John Lindley (1799–1865), botanist and horticulturist.