One of the mysteries of the English language finally explained.
Designating a flexible and protrusible radula with a band of numerous fine marginal teeth on either side of a central strip of larger teeth, occurring in certain gastropod molluscs.
Mid 19th century; earliest use found in Annals and Magazine of Natural History. From ancient Greek ῥιπιδ-, ῥιπίς fan + -o- + ancient Greek γλῶσσα tongue + -ate, after scientific Latin Rhipidoglossa, former order name (F. H. Troschel Handb. der Zool, ed. 3 553; later Rhipidoglossata).
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