| 释义 |
‖ radula|ˈrædjʊlə|
[L. rādula scraper, scraping-iron, f. rād-ere to scrape: see rase v.]
†1. Surg. (See quot.) Obs.
1753Chambers Cycl. Supp., Radula, the raspatory, a chirurgical instrument used to cleanse foul bones.
2. Zool. The odontophore or lingual ribbon of certain molluscs.
1877Huxley Anat. Inv. Anim. viii. 488 The radula is a cuticular chitinous product of the epithelium of the sub⁓radular membrane. 1878Bell Gegenbaur's Comp. Anat. 341 They form the supporting apparatus of the radula and the parts connected with it. 1901E. Step Shell Life iii. 42 The number of these teeth to one tongue or radula varies to a remarkable extent. 1928Russell & Yonge Seas ix. 202 In common with many other members of the snail family they [sc. limpets] possess a very characteristic feeding apparatus consisting of a long horny ribbon, made up of many rows of fine teeth, and known as the ‘radula’. 1959A. C. Hardy Open Sea II. vi. 128 A radula is a remarkable structure found in the mouths of all typical gastropods; it is a long ribbon, bearing a vast number of transverse rows of sharp horny teeth. 1975Sci. Amer. Feb. 106/3 The snail combines the functions of teeth and tongue in a single organ: the radula, a toothed, filelike muscle inside the mouth.
Hence ˈradular a., pertaining to the radula; ˈradulate, raduˈliferous adjs., provided with, bearing a radula; ˈraduliform a., rasp-like.
1849–52Todd Cycl. Anat. IV. 874/1 The teeth of the sheat⁓fish present all the gradations between the villiform and raduliform types. 1885Pennell Hist. Brit. F.W. Fish 34 Teeth..when much shorter than the latter [card-like]..become raduliform, or rasp-like. |