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单词 lateral tooth
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lateral tooth
lateral tooth n. (a) chiefly Zoology a tooth situated at or on the side of a structure or object; (b) Conchology and Palaeontology (in the shells of some bivalve molluscs) a projection, often flattened and elongated, towards either end of the hinge plate.
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1764 B. Martin New & Comprehensive Syst. Math. Inst. II. vi. viii. 396 The Spring, as a Regulator, is applied in Watches, with one End fixed to the Verge of the Balance, and being coiled several Times round.., it has its other End fastened to a Part towards the Extremity of the Watch-plate, which has lateral Teeth.
1769 J. Berkenhout Outl. Nat. Hist. Great Brit. & Ireland I. 198 Cardium. Bivalve. Valves equal. Hinge with middle teeth alternate, lateral teeth remote, and let into a groove in the opposite valve.
1828 J. Stark Elements Nat. Hist. II. 106 Shell regular, inequivalve, inequilateral; a single primary tooth in each valve..no lateral teeth.
1898 A. Sedgwick Student's Text-bk. Zool. I. 401 The Heteropoda... When the tongue is protruded, the lateral teeth fly apart from one another like the limbs of a pair of forceps.
1961 J. Stubblefield Davies's Introd. Palaeontol. (ed. 3) ii. 43 In the anterior and posterior regions of the hinge-plates there are long teeth, more or less horizontal, parallel to the shell-margin—these are called (inaccurately) the lateral teeth.
1996 D. J. Long & R. E. Jones in A. P. Klimley & D. G. Ainley Great White Sharks xxvii. 300/2 Mako sharks have unserrated, long, and thin anterior teeth, and shorter lateral teeth.
2000 C. D. Michener Bees of World lxxix. 462/1 Clypeal margin with strong lateral tooth.
extracted from lateraladj.n.
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