Main Entry: ro·ti·fer

Pronunciation: \ˈrō-tə-fər\

Function: noun

Etymology: ultimately from Latin rota + -fer

Date: 1793

: any of a class (Rotifera of the phylum Aschelminthes) of minute usually microscopic but many-celled chiefly freshwater aquatic invertebrates having the anterior end modified into a retractile disk bearing circles of strong cilia that often give the appearance of rapidly revolving wheels