orbitoid
/ˈɔːbɪtɔɪd/Palaeontology
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.