| 单词 | nacre |
| 例句 | A delicate thread of continuity connects these flashes of story, each complete and perfect in and of itself but accreting meaning like nacre on a pearl. Ghosts, Robots and Monsters: A Roundup of New Sci-Fi and Fantasy 2018-11-30T05:00:00Z Some bivalves like oysters and mussels possess the unique ability to secrete and deposit a calcareous nacre or “mother of pearl” around foreign particles that may enter the mantle cavity. Fundamentals of Biology 2015-01-01T00:00:00Z Some bivalves like oysters and mussels have the unique ability to secrete and deposit a calcareous nacre or “mother of pearl” around foreign particles that enter the mantle cavity. Concepts of Biology 2013-04-25T00:00:00Z The mollusc deposits layers of aragonite and conchiolin, which together form nacre, also know as mother-of-pearl. How India is building a pearl farming industry 2022-09-05T04:00:00Z Dull on the outside, its nacre gleams pearlescent within. Recovery effort aims to restore pinto abalone mollusks that once flourished in Salish Sea 2021-09-14T04:00:00Z The bead irritates the oyster and it begins to coat the bead with nacre. Connecticut jeweler lets customers pick their pearls 2015-05-17T04:00:00Z The nanoscale structure of bone, nacre and teeth consists of flake-like mineral pieces, arranged like bricks in a wall, with the organic component making up the mortar. Structure: Artificial armour : Nature : Nature Publishing Group 2015-03-24T04:00:00Z When you buy a piece of pearl jewelry, price — and value — depends on how well the pearls are matched and on their size, shape, nacre thickness, color, luster and clarity. What you should know about pearls 2014-07-20T04:00:00Z The sac coats the irritant with layers of smooth nacre, also known as mother-of-pearl. As the Pearl Turns 2013-06-27T17:15:20.503Z The oyster reacts to the introduction of the foreign body by coating it with layers of nacre - crystallized calcium carbonate and an organic protein. Pearlers past and present in Australian town 2012-09-09T23:50:46Z The Chinese especially are adepts at placing certain small bodies, specially prepared, in the shells of the pearl oyster, which, after a short time, becomes coated with mother-of-pearl, or nacre. Narrative of the Circumnavigation of the Globe by the Austrian Frigate Novara, Volume I (Commodore B. Von Wullerstorf-Urbair,) Undertaken by Order of the Imperial Government in the Years 1857, 1858, & 1859, Under the Immediate Auspices of His I. and R. Highness the Archduke Ferdinand Maximilian, Commander-In-Chief of the Austrian Navy. 2012-01-02T03:00:25.873Z The artificial structural materials made so far are not yet as sophisticated as bone, fish scales or nacre — but perhaps they don't need to be. Structure: Artificial armour : Nature : Nature Publishing Group 2015-03-24T04:00:00Z The iridescent flames sometimes found on the pearl's nacre are called Dragon flame. What you should know about pearls 2014-07-20T04:00:00Z The growing pearl rotates itself, which allows the nacre to deposit evenly over its surface. As the Pearl Turns 2013-06-27T17:15:20.503Z Together, these induce the host oyster to begin coating the bead with nacre. Obituaries: Salvador Assael, 88, Dies; Coaxed Riches From Pearls 2011-04-13T00:27:54Z Out of curiosity, he scraped the inner coating of one of the larger shells and found layer upon layer of nacre, or mother of pearl, which crumbled away from the knife. The Second String 2011-04-08T02:00:07.383Z Capturing the intricacies of bone and nacre in one step is “very complicated”, says Saiz. Structure: Artificial armour : Nature : Nature Publishing Group 2015-03-24T04:00:00Z A pearl forms inside the soft tissue of a living shelled mollusk when the animal reacts to grit by coating it with concentric layers of crystalline calcium carbonate called nacre, or mother-of-pearl. What you should know about pearls 2014-07-20T04:00:00Z Moonlight shone on scintillant rock; the loftiest, snow-capped peaks gleamed like palest nacre.... Caravans By Night A Romance of India 2011-01-03T03:01:02.370Z The oyster vanquishes the invader by surrounding it with the fine, opalescent deposits of calcium carbonate known as nacre, and little by little a pearl is born. Obituaries: Salvador Assael, 88, Dies; Coaxed Riches From Pearls 2011-04-13T00:27:54Z The shell is built up of very thin layers of nacre, or mother of pearl, and calcareous or chalky matter, the thinner being the layers of nacre the more lustrous and iridescent is the shell. Beautiful Shells of New Zealand An Illustrated Work for Amateur Collectors of New Zealand Marine Shells, with Directions for Collecting and Cleaning them Her skin was like nacre, her lips like petunia petals. Shadows of Flames A Novel I know a purer nacre,— The white pearls of her teeth. Weeds by the Wall Verses A sliding door was pushed back—a black door inlaid with characters in glistening nacre—and Trent stepped into a dimly illuminated area. Caravans By Night A Romance of India 2011-01-03T03:01:02.370Z While the cheaper grades of indestructible pearls have but three or four layers of nacre, some of the fine ones have as many as thirty or more. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public The popular belief has been that the pearl was formed by secretions of nacre deposited upon a grain of sand or other foreign particle drawn within the oyster through its contact with the sea's bottom. East of Suez Ceylon, India, China and Japan Out of the nacre of any mussel or oyster shell you might cut, at your pleasure, any quantity of small flat circular disks of the prettiest color and luster. Aratra Pentelici, Seven Lectures on the Elements of Sculpture Given before the University of Oxford in Michaelmas Term, 1870 Pinwheels of violet fire Whirl and spin before my bloodshot eyes— Violet, puce, ochre, nacre, euchre ... all the other Colours, Including jade, umber and sienna. Songs for a Little House This shell, then, has lost its lustre, its colors, and often even its nacre, if it had any; and in this altered condition it is usually entirely white. Lamarck, the Founder of Evolution His Life and Work In both types the pearly appearance is obtained by lining the interior, or coating the exterior, with more or less numerous layers of what is known as "nacre" or some times as "essence d'oriente." A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public They raced to the water, that gleamed pale as nacre in the deepening twilight in the eye of the evening star. Widdershins Very largely used for decoration; small plaques of nacre often engraved with scenes of men worshipping, &c. How to Observe in Archaeology Associated words: cognate, cognation, matricide, maternalism, uterine, matriarchy, matriarchal. motherhood, n. maternity. motherly, a. maternal. mother-of-pearl, n. nacre. motion, n. movement, activity; gesture, signal, gesticulation; port, gait; impulse. Putnam's Word Book Dreams and visions were not excluded from influence, and nacre or less affected his moral judgment; but he did not, consciously and on principle, beat down his conscience in submission to outward impressions. Phases of Faith Passages from the History of My Creed The "nacre" is then prepared from this powder. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public A pearl consists of carbonate of lime, in the form of nacre, and animal matter arranged in concentric layers around a nucleus; the solution indicating no trace of any phosphate of lime. The Mirror of Literature, Amusement, and Instruction Volume 20, No. 570, October 13, 1832 This growth of the pearl, as it is incorrectly termed, can be seen by breaking open a $500 gem, when the nacre will be seen in layers, resembling the section of an onion. Scientific American Supplement, No. 362, December 9, 1882 In the bright water lie hundreds of the shells of the fresh-water mussels, the bearers of pearls sometimes, and always lined with that of which pearls are made, the lustrous nacre. The Naturalist on the Thames And the whole is held in place with curious ornamental combs, and shot through with long fine pins of gold, silver, nacre, transparent tortoise-shell, or lacquered wood, with cunningly carven heads. Glimpses of Unfamiliar Japan Second Series The fineness of the pearly effect becomes greater as the preparation ages, so very fine imitations are usually made from old "nacre." A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public If a pearl-secreting oyster be inherently robust, its defence against assault from without may consist of the strengthening of the interior at the point of attack by deposits of nacre. Tropic Days The interior is scarcely less attractive, the nacre having a pink and bluish lustre, while the "lip" is dark red. My Tropic Isle For an instant longer she admired herself in the glass, innocently vain of her fair flower-like skin, under the nacre drops of the pearls. Doctor Pascal Listen: A pearl is nothing more or less than nacre, a fluid secretion of a certain variety of oyster—not the eatable kind. Aunt Jane's Nieces out West Such pearls originate, no doubt, in the ordinary way, but, becoming an intolerable nuisance on account of increasing size, are confined in nacre. Tropic Days Another illustration is that of an accumulation of nacre which has assumed accidental resemblance to a miniature shark. Tropic Days The nacre has reproduced the details of the chiton's exterior with the fidelity of a casting, and further reveals the fact that it was alive when entombed, for its struggles to escape are solidified. Tropic Days |
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