| 单词 | retractile |
| 例句 | When the field goal is very, very nice, the denture effect becomes more pronounced, to the point that it starts to resemble a second, retractile mouth, tucked within the larger one; I think of “Alien.” Stephen Curry’s Mouth Guard: An Investigation 2015-06-16T04:00:00Z The bridge is formally known as a “retractile” bridge. Beloved, Tiny Bridge in Brooklyn Is Opened for Repairs 2013-05-14T00:39:50Z The pseudopods are retractile, the axial filament being absorbed as the filament grows shorter and thicker and disappearing when the pseudopod merges into the ectoplasm, to be reformed at the same time with the pseudopod. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2 "Hearing" to "Helmond" 2012-04-25T02:00:53.567Z Most species have sharp, curved claws, often retractile between some of the lamellae or into a special sheath. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z The bells or cups are not, as might be fancied from a casual inspection, open like wineglasses at the top, but furnished with a retractile disk or cover, on which the cilia are arranged. Marvels of Pond-life A Year's Microscopic Recreations 2011-08-01T02:00:12.067Z That this may be more perfectly accomplished, these arms are studded along their inner surface with rows of sucking discs, in each of which, by means of a retractile piston, a vacuum can be produced. Sea Monsters Unmasked and Sea Fables Explained 2011-07-11T02:00:07.857Z The fore-feet have five toes, the hind-feet four or five; the claws are strong, blunt, and formed for digging, and are not retractile. The New Gresham Encyclopedia Volume 4, Part 1: Deposition to Eberswalde 2011-04-14T02:00:57.977Z The jaws were widely extended, so that the sharp retractile teeth were plainly visible, and the forked tongue at intervals was shot forward, and gleamed in the sun. The Young Yagers A Narrative of Hunting Adventures in Southern Africa 2010-12-20T17:11:52.020Z Mantle oval, covering the head and the greater part of the body; anterior tentacles, ill-developed; branchiae generally retractile. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z The creature itself stands upon a retractile foot-stalk, and thrusts out above its battlements a large head, with four leaf-like expansions surrounded by cilia. Marvels of Pond-life A Year's Microscopic Recreations 2011-08-01T02:00:12.067Z The larv� have small retractile heads, and feed on low-growing plants, keeping themselves well concealed on the lower leaves close to the ground. Butterflies and Moths (British) The phenomenon is a purely physical synthetic reproduction of the phenomenon of coagulation, the cohesion figure being in fact a retractile clot. The Mechanism of Life Decapoda.—Four pairs of ordinary non-retractile arms which are shorter than the body, and one pair of tentacular arms, situated between the third and fourth normal arms on each side and retractile within special pouches. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" The first section of the family, forming the subfamily Mustelinae, is typically characterized by the short and partially webbed toes, furnished with short, compressed, sharp, curved and often partially retractile claws. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 4 "Carnegie Andrew" to "Casus Belli" The reader will remember that in the Vorticella previously described, the bells stood upon stalks that were very flexible, and retractile by means of a muscle running down their length. Marvels of Pond-life A Year's Microscopic Recreations 2011-08-01T02:00:12.067Z There is also in some genera a median retractile sensory papilla on the dorsal posterior surface above the rectum, not covered by the cuticle. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 2 "Chicago, University of" to "Chiton" It is, of course, well known that the tiger's retractile claws are like those of a cat, whereas the cheetah has toe-nails similar to those of a dog. The Last Voyage to India and Australia, in the 'Sunbeam' Tentacular arms long, not retractile; resisting apparatus well developed. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" The claws are large, strongly curved, compressed, very sharp, and exhibit the retractile condition in the highest degree. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 4 "Carnegie Andrew" to "Casus Belli" The Carchesium differs from the common Vorticella, by branching like a tree, but the stems are all retractile, although the trunk seldom exercises the power. Marvels of Pond-life A Year's Microscopic Recreations 2011-08-01T02:00:12.067Z A short distance behind the head were two tremendous reddish-brown fins, with strong supporting spines that seemed to terminate in retractile claws. The Terror from the Depths The cat's claws are of course retractile, as I have just described to you. The Wonders of the Jungle, Book Two Numerous pedal tentacles around the mouth, which are retractile within sheaths. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" The under side of the tarsus is completely covered with hair, and the claws are longer and less retractile. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 4 "Carnegie Andrew" to "Casus Belli" The arteries are highly elastic, being extensile and retractile both in length and breadth. Special Report on Diseases of the Horse The brownish fins were rigid as metal, the retractile claws unsheathed and cruelly curved. The Terror from the Depths Once upon a time, many, many hundred years ago, the dog did use its claws; they were then retractile. The Wonders of the Jungle, Book Two When he clambered up on the rostrum they extended their audio-appendages and retractile fingers and accorded him a round of applause. The Servant Problem The thoracic vertebrae number 13; the feet are digitigrade, with five front and four hind toes, of which the claws are retractile; and the metatarsus is haired all round. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 4 "Carnegie Andrew" to "Casus Belli" Tentacle: a flexible sensory or tactile process; in some cases retractile: usually prefixed by a descriptive term indicating the structure to which it is attached. Explanation of Terms Used in Entomology The Falcons, on account of their general perfection, their rapid flight, their piercing vision, their perfect feet armed with retractile claws, the beauty of their forms, and the ease and rapidity of their motions; 2nd. Contributions to the Theory of Natural Selection A Series of Essays The members of the Cat Tribe have retractile claws. The Wonders of the Jungle, Book Two All dogs, wild or tame, walk upon their toes with a firm, elastic gait, and their toes are not retractile. Anecdotes of the Habits and Instinct of Animals They are not tree-climbers, as their claws are not sufficiently retractile for that. The Bush Boys History and Adventures of a Cape Farmer and his Family It was a very strong, muscular creature, with short stout legs and broad feet, with claws not so sharp and retractile as a lynx's; seemingly intermediate between a cat's claws and a dog's nails. Left on Labrador or, The cruise of the Schooner-yacht 'Curlew.' as Recorded by 'Wash.' The hind legs are much shorter than the front, and the feet have only four toes with blunt worn claws, not retractile, but like those of the dog. Natural History of the Mammalia of India and Ceylon The body is elongate, slightly narrowed anteriorly, and drawn out posteriorly into a long, retractile, tail-like portion. Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901 A retractile spring can be adjusted to cause cut-off at any required current. Scientific American Supplement, No. 711, August 17, 1889 Although they resemble cats superficially they are not directly related to them and their claws are only partly retractile. Camps and Trails in China A Narrative of Exploration, Adventure, and Sport in Little-Known China On, deeper and deeper into the wood,—now dodging under the green and snaky cat-briers, with their retractile thorns and vicious clinging grasp,—now dashing along the woodman's paths,—now struggling among the opposing underwood. The Atlantic Monthly, Volume 05, No. 27, January, 1860 They are usually retractile, and often transversely furrowed or plicate, and are regarded as olfactory organs. The Gutenberg Webster's Unabridged Dictionary Section R They have two pairs of retractile hooks, near the mouth. The Gutenberg Webster's Unabridged Dictionary Section I, J, K, and L YOU! whose fine fingers fill the organic cells, With virgin earth, of woods and bones and shells; Mould with retractile glue their spongy beds, And stretch and strengthen all their fibre-threads.— The Botanic Garden A Poem in Two Parts. Part 1: the Economy of Vegetation The last four segments, of decreasing breadth, are retractile beneath the carapax, as is also the broad plume that terminates them, and which is formed of three short, transparent, and elegantly ciliated bristles. Scientific American Supplement, No. 385, May 19, 1883 It is much more lanky and long-legged than the pure felines, is unable to climb trees, and has claws only partially retractile. The Travels of Marco Polo — Volume 1 In all of them the claws are more or less retractile, and they walk on the ends of their fingers and toes. American Big Game in Its Haunts The little creature is conveyed there by the mother's lips, and immediately attaches itself to one of the nipples, which are retractile, and capable of being drawn out to a considerable length. Australian Search Party Nor was there yet any foot like that of the cats, with sharp retractile claws adapted to seizing and tearing the prey. The Elements of Geology |
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