| 释义 |
keeled, a.|kiːld|
[f. keel n.1 + -ed2.]
a. Of a boat: Having a keel; furnished with a keel.
1847Medwin Shelley I. 239 The boat was..keeled and clinker-built. 1853Sir H. Douglas Milit. Bridges 100 As is often the case with keeled boats, the sides and timbers are slight.
b. Having a central dorsal ridge; carinate.
1787Fam. Plants I. 99 Perianth five-parted..the divisions, awl'd, keel'd. Ibid. 375 Seeds..keel'd, annexed to the gaping suture. 1828Stark Elem. Nat. Hist. II. 85 Shell oblong,..flattish on the posterior, and somewhat angulated and keeled on the anterior side. 1848R. Tyas Favourite Field Flowers I. 3 Two strap-shaped, keeled, and blunt leaves. 1865Reader 29 Apr. 486/2 The keeled sternum, the grand feature of the skeleton of birds, is very fully developed. 1879Sir G. Scott Lect. Archit. II. xiii. 148 Their edges often filleted, or ‘keeled’, that is, decorated by an arris or edge projecting from their round surface.
c. keeled scale, in certain reptiles, a scale with a central ridge.
1870A. R. Wallace Contrib. Theory Nat. Selection iii. 99 The large caterpillar..startled him by its resemblance to a small snake... It resembled a poisonous viper, not a harmless species of snake, as was proved by the imitation of keeled scales on the crown produced by the recumbent feet, as the caterpillar threw itself backward! 1907R. L. Ditmars Reptile Bk. xviii. 160 With most of the species [of plated lizard], the scales of the middle portion of the back are strongly keeled. 1970New Yorker 19 Sept. 30/3 It [sc. DeKay's snake, Storeria dekayi] has keeled scales—a keeled scale is one with a ridge down its middle—which give it a smooth, unshiny appearance.
d. keeled scraper (F. grattoir caréné) Archæol., a form of prehistoric flint-tool.
1911W. J. Sollas Anc. Hunters viii. 218 Carefully flaked like the snout of the keeled scraper. 1921M. C. Burkitt Prehistory iv. 75 Keeled scrapers. This tool..is very common in Middle Aurignacian times. It has a flat under surface, from which the flakes on the upper surface are struck off in a fan-shaped manner. 1927Peake & Fleure Hunters & Artists iv. 46 Here [sc. at La Ferrassie etc.] we find keeled scrapers, of a massive form but carelessly made, and more rarely gravers trimmed obliquely. 1968Encycl. Brit. IX. 448/1 Core scrapers were made on small blocks or were actual cores reutilized as scrapers. Keeled scrapers present a systematic and symmetric removal of tiny blades to form a thick, fluted scraper extremity. |