n.
Pronunciation: ' r ō -t ə -f ə r
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