Sentence Examples


  • When the summits of these are worn by mastication their surfaces present circles of dentine surrounded by a border of enamel, and as attrition proceeds different patterns are produced by the union of the bases of the cusps, a trefoil form being characteristic of some species.
  • The temporary includes vetches, pulse, lupine, clover and trifolium; and the perennial, meadow-trefoil, lupinella, sulla (fledysarum coronarium), lucerne and darnel.
  • Greater freedom of moulding and the use of trefoil and cinquefoil may be, but need not be, explained in this way.
  • (See Swine and Peccary.) The Hippopotamidae are an exclusively Old World group, in which the muzzle is broad and rounded and quite unlike that of the Suidae, while the crowns of the cheek-teeth form a distinctly trefoil pattern, when partially worn, which is only foreshadowed in those of the latter.
  • On the other hand, in Merycopotamus, of the Lower Pliocene of India and Burma, the upper molars have lost the fifth intermediate cusp of Ancodon; and thus, although highly selenodont, might be easily modified, by a kind of retrograde development, into the trefoil-columned molars of Hippopotamus.

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