One of the mysteries of the English language finally explained.
A minute or microscopic animal of the class or phylum Rotatoria; (now) specificallya rotifer.
Of or relating to the class or phylum Rotatoria. Now rare.
Mid 19th century; earliest use found in Andrew Pritchard (1804–1882), microscopist. From Rotatoria + -ian. With use as adjective compare earlier rotatorial.
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