| 释义 |
talcenUK
talc T0022900 (tălk)n. A fine-grained white, greenish, or gray mineral, Mg3Si4O10(OH)2, having a soft soapy feel and used in talcum and face powder, as a paper coating, and as a filler for paint and plastics.tr.v. talcked, talck·ing, talcs or talced or talc·ing To apply this substance to (a photographic plate, for example).
[French, from Medieval Latin talcum and Old Spanish talco, both from Arabic ṭalq, from Persian talk.]talc (tælk) n1. See talcum powder2. (Minerals) a white, grey, brown, or pale green mineral, found in metamorphic rocks. It is used in the manufacture of talcum powder and electrical insulators. Composition: hydrated magnesium silicate. Formula: Mg3Si4O10(OH)2. Crystal structure: monoclinicvb, talcs, talcking, talcked, talcs, talcing or talced (tr) to apply talc to[C16: from Medieval Latin talcum, from Arabic talq mica, from Persian talk] ˈtalcose, ˈtalcous adjtalc (tælk)
n. 1. a soft green-to-gray mineral, hydrous magnesium silicate, Mg3(Si4O10)(OH)2. 2. talcum powder. [1595–1605; < Medieval Latin talcum < Arabic ṭalq mica < Persian talk] talc (tălk) A white, greenish, or gray mineral that is a silicate of magnesium, usually occurring as massive mica-like flakes. It has a soft, soapy texture, and is used in face powder and talcum powder, for coating paper, and as a filler in paints and plastics. Talc is the mineral used to represent a hardness of 1 on the Mohs scale.talc
Past participle: talced/talcked
Gerund: talcing/talcking
| Present |
|---|
| I talc | | you talc | | he/she/it talcs | | we talc | | you talc | | they talc |
| Preterite |
|---|
| I talced/talcked | | you talced/talcked | | he/she/it talced/talcked | | we talced/talcked | | you talced/talcked | | they talced/talcked |
| Present Continuous |
|---|
| I am talcing/talcking | | you are talcing/talcking | | he/she/it is talcing/talcking | | we are talcing/talcking | | you are talcing/talcking | | they are talcing/talcking |
| Present Perfect |
|---|
| I have talced/talcked | | you have talced/talcked | | he/she/it has talced/talcked | | we have talced/talcked | | you have talced/talcked | | they have talced/talcked |
| Past Continuous |
|---|
| I was talcing/talcking | | you were talcing/talcking | | he/she/it was talcing/talcking | | we were talcing/talcking | | you were talcing/talcking | | they were talcing/talcking |
| Past Perfect |
|---|
| I had talced/talcked | | you had talced/talcked | | he/she/it had talced/talcked | | we had talced/talcked | | you had talced/talcked | | they had talced/talcked |
| Future |
|---|
| I will talc | | you will talc | | he/she/it will talc | | we will talc | | you will talc | | they will talc |
| Future Perfect |
|---|
| I will have talced/talcked | | you will have talced/talcked | | he/she/it will have talced/talcked | | we will have talced/talcked | | you will have talced/talcked | | they will have talced/talcked |
| Future Continuous |
|---|
| I will be talcing/talcking | | you will be talcing/talcking | | he/she/it will be talcing/talcking | | we will be talcing/talcking | | you will be talcing/talcking | | they will be talcing/talcking |
| Present Perfect Continuous |
|---|
| I have been talcing/talcking | | you have been talcing/talcking | | he/she/it has been talcing/talcking | | we have been talcing/talcking | | you have been talcing/talcking | | they have been talcing/talcking |
| Future Perfect Continuous |
|---|
| I will have been talcing/talcking | | you will have been talcing/talcking | | he/she/it will have been talcing/talcking | | we will have been talcing/talcking | | you will have been talcing/talcking | | they will have been talcing/talcking |
| Past Perfect Continuous |
|---|
| I had been talcing/talcking | | you had been talcing/talcking | | he/she/it had been talcing/talcking | | we had been talcing/talcking | | you had been talcing/talcking | | they had been talcing/talcking |
| Conditional |
|---|
| I would talc | | you would talc | | he/she/it would talc | | we would talc | | you would talc | | they would talc |
| Past Conditional |
|---|
| I would have talced/talcked | | you would have talced/talcked | | he/she/it would have talced/talcked | | we would have talced/talcked | | you would have talced/talcked | | they would have talced/talcked |
Thesaurus| Noun | 1. |  talc - a fine grained mineral having a soft soapy feel and consisting of hydrated magnesium silicate; used in a variety of products including talcum powdertalcumtalcum powder, talcum - a toilet powder made of purified talc and usually scented; absorbs excess moisturemineral - solid homogeneous inorganic substances occurring in nature having a definite chemical compositionsoaprock, soap-rock, soapstone, steatite - a soft heavy compact variety of talc having a soapy feel; used to make hearths and tabletops and ornamentsFrench chalk - a soft white compact talc used to mark cloth or to remove grease stainsrensselaerite - a kind of soft talc; sometimes used as wood filler | | Verb | 1. | talc - apply talcum powder to (one's body)powder - apply powder to; "She powdered her nose"; "The King wears a powdered wig" |
Translationstalc (tӕlk) noun1. a kind of soft mineral that feels like soap. 滑石，雲母 滑石，云母 2. talcum. 滑石 滑石talcum (ˈtӕlkəm) noun (also talcum powder. often abbreviated to talc) a kind of fine, usually perfumed, powder made from talc, used on the body. 滑石粉 滑石粉talcenUK
talc, mineral ranging in color from white through various shades of gray and green to the red and brown of impure specimens, translucent to opaque, and having a greasy, soapy feel. It is a hydrous silicate of magnesium, Mg3Si4O10(OH)2, and usually contains small quantities of nickel, iron, and aluminum as impurities. It occurs commonly in folia (thin layers), but is also found in coarsely granular, finely granular, or cryptocrystalline masses. Soapstonesoapstone
or steatite
, metamorphic rock of which the characteristic and usually chief mineral is talc, but which also contains varying parts of chlorite, mica, tremolite, quartz, magnetite, and iron compounds.
..... Click the link for more information. , or steatite, is a massive, granular form of talc. French chalk is a fine-grained variety. Talc is usually associated with chlorite schists, serpentine, dolomite, and other metamorphic rocks; it is apparently a secondary mineral formed by the alteration of other magnesium silicates. There are important deposits of talc in Austria, Italy, France, and Canada and in the United States in California, North Carolina, Texas, Georgia, and Montana. Talc is used in making paper (as a filler), paints, face and talcum powder, soap, fireproof roofing, foundry facings, lubricants, linoleum and oilcloth, electrical insulation, and pottery.Talc a widespread mineral of the class of phyllosilicates, with the formula Mg3 [Si4O10](OH)2. The magnesium may be replaced by Fe, Ni, Al, or Cr. Varieties of talc include minnesotaite, which contains Fe (50–80 atomic percent), willemseite, which is essentially nickeliferous talc, and steatite, or soapstone, which is compact massive talc. The crystal structure of talc is a superposition of layers about 9 angstroms thick, consisting of two silicon oxide layers with Mg and OH ions between them. The charges of the atoms in the layers are balanced, and the layers are held together only by weak van der Waals’ bonds. The symmetry of the unit cell is triclinic, but any relative displacement of the layers causes a transition to a less ordered, monoclinic structure. Talc forms foliated or compact fine-grained masses and, less frequently, irregular lamellar crystals, up to 10 cm in size, which readily break into flexible transparent lamellae along cleavage planes. Talc may be white or various shades of green. It is soft, with a hardness of 1 on Mohs’ scale, and has a greasy feel. Its density is 2,776–2,824 kg/m3; minnesotaite has a density of 3,010 kg/m3. Although talc is formed mainly at great depths under high temperatures and pressures, crystallization is possible at the earth’s surface in a strongly alkaline medium. Commercial deposits of talc are genetically associated with ultrabasic rocks or with magnesium-carbonate rocks, such as dolomite and magnesite. Talc occurs in talcose rocks, with admixtures of carbonates or chlorite, which are formed during normal metamorphism of magnesium silicate rocks, and as the more valuable pure talcites, formed by hydrometamorphic reactions involving contact between magnesium and siliceous rocks, such as gneisses, slates, or quartzites. In the USSR, talc is obtained from the Shabrovskii talc-magnesite and the Miass talcite deposits in the Central Urals and from the Onot steatite talc deposit in the Vostochnyi Saian. A western Baikal talc-bearing region has been discovered. Abroad, major deposits of talc exist in Canada (Madoc), the USA (Gouverneur), and France (Luzenac). Talc is used as an extender in the rubber, paper, and paint and varnish industries. It is also used in medicine and in the perfume and cosmetics industries; in technology it is used as a solid lubricant. An important application of talc is in ceramics, especially ceramic products used in radio insulation. Nonferrous steatite talc is an ornamental stone. REFERENCEMestorozhdeniia tal’ka SSSR. Moscow, 1973.P. P. SMOLINInhalation of talc dust may lead to talcosis, an illness of the pneumonoconiosis group. Talcosis is observed in workers in the talc extraction and processing industries, as well as in the perfume and rubber industries. As a rule, it is a benign, slowly progressing illness, which has little effect on general health and work capacity. The most important means for its prevention are mechanization and automation of labor, dust suppression, dust collection, and the use of respirators.REFERENCEBorshchevskii, Iu. M., V. G. Artamonova, and V. M. Retnev. Silikatozy i gigiena iruda. Leningrad, 1974.talc[talk] (mineralogy) Mg3Si4O10(OH)2 A whitish, greenish, or grayish hydrated magnesium silicate mineral crystallizing in the monoclinic system; it is extremely soft (hardness is 1 on Mohs scale) and has a characteristic soapy or greasy feel. talcA soft mineral composed of hydrous magnesium silicate; a major ingredient of soapstone; used on roll roofing to prevent sticking in the roll.talc a white, grey, brown, or pale green mineral, found in metamorphic rocks. It is used in the manufacture of talcum powder and electrical insulators. Composition: hydrated magnesium silicate. Formula: Mg3Si4O10(OH)2. Crystal structure: monoclinic talcenUK
talc [talk] a native hydrous magnesium silicate, sometimes with a small amount of aluminum silicate; used as a dusting powder. The inhalation of talc is associated with a wide variety of respiratory disorders.talc (talk), Native hydrous magnesium silicate, sometimes containing small proportions of aluminum silicate, purified by boiling powdered talc with hydrochloric acid in water; used in pharmacy as a filter aid, as a dusting powder, and in cosmetic preparations. Synonym(s): French chalk, soapstone, talcum [Ar. talq] talc A dry lubricant used in products that may contact mucocutaneous surfaces–eg, condoms, dental dams, and non-surgical latex gloves; talc was banned from surgical gloves in 1991 by the FDAtalc (talk) Native hydrous magnesium silicate used in pharmacy as a filter aid, as a dusting powder, and in cosmetic preparations. Also called talcum. [Ar. talq]FinancialSeeTotal Annual Loan CostsTALC
| Acronym | Definition |
|---|
| TALC➣Tourism Area Life Cycle | | TALC➣Teaching-aids At Low Cost | | TALC➣Transportation and Land Use Coalition | | TALC➣Teaching and Language Corpora | | TALC➣Total Annual Loan Cost | | TALC➣The American Lutheran Church | | TALC➣Technical Assistance Legal Center | | TALC➣Transport and Logistics Centre (Australia) | | TALC➣Tennessee Academic Library Collaborative | | TALC➣Textile Apparel Linkage Council | | TALC➣The Adolescent Leadership Council (Hasbro Children's Hospital; Providence, RI) | | TALC➣Trim, Appearance, Lighting and Color (automotive component engineering) | | TALC➣Topic A La Con | | TALC➣Tactical Airborne Laser Communications | | TALC➣The Artificial Logic Corporation | | TALC➣Tactical Airlift Center | | TALC➣Territory Anti Litter Committee | | TALC➣Technology Association Leaders' Council |
talcenUK
Synonyms for talcnoun a fine grained mineral having a soft soapy feel and consisting of hydrated magnesium silicateSynonymsRelated Words- talcum powder
- talcum
- mineral
- soaprock
- soap-rock
- soapstone
- steatite
- French chalk
- rensselaerite
verb apply talcum powder to (one's body)Related Words |