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plural radulae
(zoology) The rasping tongue of snails and all other mollusks except bivalves. quotations
The radula end containing the first 5–10 rows of teeth showed evidence of wear from rasping over rock surfaces during feeding and was removed using dissection.
2015 February 18, Asa H. Barber, Dun Lu, Nicola M. Pugno, “Extreme strength observed in limpet teeth”, in Journal of the Royal Society Interface
What Kruta found in the ammonoid fossils was an unfoldable radula covered with delicate, comblike teeth.
2017, Danna Staaf, Squid Empire, ForeEdge, page 98