Definition of orbitolinid in US English:

orbitolinid

adjective

  • Of or relating to the family Orbitolinidae of foraminiferans, occurring as fossils in deposits of Jurassic to mid-Tertiary age.

noun

  • A foraminiferan of the family Orbitolinidae.

Origin

1950s. From scientific Latin Orbitolinidae, family name from Orbitolina + -idae.

Pronunciation

orbitolinid

/ɔːˌbɪtəˈlɪnɪd/