Definition of orbitoid in English:

orbitoid

adjective

  • Of, belonging to, or designating a fossil foraminiferan of the genus Orbitoides, family Orbitoididae, or superfamily Orbitoidacea, typically having a discoid or lenticular shell.

noun

  • Such a fossil.

Origin

Mid 19th century; earliest use found in Charles Lyell (1797–1875), geologist. From scientific Latin Orbitoides, genus name from classical Latin orbita + -oīdēs.

Pronunciation

orbitoid

/ˈɔːbɪtɔɪd/