One of the mysteries of the English language finally explained.
A foraminiferan of the order Rotaliida, suborder Rotaliina, or superfamily Rotaliacea, having a perforate calcareous test, typically in the form of a globular spiral.
Of, relating to, or characteristic of this group of foraminiferans.
Mid 19th century; earliest use found in Annals and Magazine of Natural History. From scientific Latin Rotalia + -id, after German Rotaliden, plural noun.
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