silver mirror test for aldehydes [tollens' reagent] defin... | English dictionary

Collins

silver

  

      n  
1   
a    a very ductile malleable brilliant greyish-white element having the highest electrical and thermal conductivity of any metal. It occurs free and in argentite and other ores: used in jewellery, tableware, coinage, electrical contacts, and in electroplating. Its compounds are used in photography. Symbol: Ag; atomic no.: 47; atomic wt.: 107.8682; valency: 1 or 2; relative density: 10.50; melting pt.: 961.93°C; boiling pt.: 2163°C  
b    (as modifier)  
a silver coin         Related adj       argent  
2    coin made of, or having the appearance of, this metal  
3    cutlery, whether made of silver or not  
4    any household articles made of silver  
5      (Photog)   any of a number of silver compounds used either as photosensitive substances in emulsions or as sensitizers  
6   
a    a brilliant or light greyish-white colour  
b    (as adj.)  
silver hair     
7       short for       silver medal  
      adj  
8    well-articulated  
silver speech     
9    prenominal   denoting the 25th in a series, esp. an annual series  
a silver wedding anniversary     
      vb  
10    tr   to coat with silver or a silvery substance  
to silver a spoon     
11    to become or cause to become silvery in colour  
     (Old English siolfor; related to Old Norse silfr, Gothic silubr, Old High German silabar, Old Slavonic sirebro)  
  silverer      n  
  silvering      n  


free silver  
      n   the unlimited minting of silver coins, esp. when at a fixed ratio to gold  
German silver  
      n      another name for       nickel silver  
horn silver  
      n      another name for       cerargyrite  
nickel silver  
      n   any of various white alloys containing copper (46--63 per cent), zinc (18--36 per cent), and nickel (6--30 per cent): used in making tableware, etc.,   (Also called)    German silver, pakthong  
ruby silver  
      n      another name for       proustite       pyrargyrite  
silver age  
      n  
1    (in Greek and Roman mythology) the second of the world's major epochs, inferior to the preceding golden age and characterized by opulence and irreligion  
2    the postclassical period of Latin literature, occupying the early part of the Roman imperial era, characterized by an overindulgence in elegance for its own sake and empty scholarly rhetoric  
silver beet  
      n   a variety of beet, Beta vulgaris cicla, having large firm green leaves: staple cooked green vegetable in Australia and New Zealand  
silver bell  
      n   any of various deciduous trees of the styracaceous genus Halesia, esp. H. carolina, of North America and China, having white bell-shaped flowers,   (Also called)    snowdrop tree  
silver belly  
      n     (N.Z)   a freshwater eel  
silver birch  
      n   a betulaceous tree, Betula pendula, of N temperate regions of the Old World, having silvery-white peeling bark  
   See also       birch       1  
silver bromide  
      n   a yellowish insoluble powder that darkens when exposed to light: used in making photographic emulsions. Formula: AgBr  
silver certificate  
      n   (formerly) a banknote issued by the U.S. Treasury to the public and redeemable in silver  
silver chloride  
      n   a white insoluble powder that darkens on exposure to light because of the production of metallic silver: used in making photographic emulsions and papers. Formula: AgCl  
silver disc  
      n   (in Britain) an album certified to have sold 60000 copies or a single certified to have sold 200000 copies  
   Compare       gold disc       platinum disc  
silver-eye  
      n     (Austral. and N.Z.)      another name for       white-eye  
silver fern  
      n     (N.Z)  
1       another name for       ponga  
2    a formalized spray of fern leaf, silver on a black background: the symbol of New Zealand sporting teams, esp. the All Blacks  
silver fir  
      n   any of various fir trees the leaves of which have a silvery undersurface, esp. Abies alba, an important timber tree of central and S Europe  
silver fox  
      n  
1    an American red fox in a colour phase in which the fur is black with long silver-tipped hairs  
2    the valuable fur or pelt of this animal  
silver frost  
      n      another name for       glaze ice  
silver-gilt  
      n   silver covered with a thin film of gold  
silver iodide  
      n   a yellow insoluble powder that darkens on exposure to light: used in photography and artificial rainmaking. Formula: AgI  
silver lining  
      n   a comforting or hopeful aspect of an otherwise desperate or unhappy situation (esp. in the phrase every cloud has a silver lining)  
silver maple  
      n   a North American maple tree, Acer saccharinum, having five-lobed leaves that are green above and silvery-white beneath  
silver medal  
      n   a medal of silver awarded to a competitor who comes second in a contest or race  
   Compare       gold medal       bronze medal  
silver nitrate  
      n   a white crystalline soluble poisonous substance used in making photographic emulsions, other silver salts, and as a medical antiseptic and astringent. Formula: AgNO3  
   See also       lunar caustic  
silver plate  
      n  
1    a thin layer of silver deposited on a base metal  
2    articles, esp. tableware, made of silver plate  
      vb  
  silver-plate  
3    tr   to coat (a metal, object, etc.) with silver, as by electroplating  
silver screen  
      n  
the  
Informal  
1    films collectively or the film industry  
2    the screen onto which films are projected  
silver service  
      n   (in restaurants) a style of serving food using a spoon and fork in one hand like a pair of tongs  
silver standard  
      n   a monetary system in which the legal unit of currency is defined with reference to silver of a specified fineness and weight and sometimes (esp. formerly) freely redeemable for it  
silver thaw  
      n     (Canadian)  
1    a freezing rainstorm  
2       another name for       glitter       7  
silver-tongued  
      adj   persuasive; eloquent  
silver-Y moth  
      n   a brownish noctuid moth, Plusia gamma, having a light Y-shaped marking on each forewing; it migrates in large flocks,   (Often shortened to)    silver-Y  
sterling silver  
      n  
1    an alloy containing not less than 92.5 per cent of silver, the remainder usually being copper  
2    sterling-silver articles collectively  
English Collins Dictionary - English Definition & Thesaurus  
Collaborative Dictionary     English Definition
n.
a senior person who is an Internet user
n.
is a test process that is performed after the software has been changed in order to verify if the changes didn't affect other software parts
o.
Eddy current Test
Non destructive test method, abreviation in accordance with norm EN4179 or NAS410
o.
Penetrate Test
Non destructive test method, abreviation in accordance with norm EN4179 or NAS410
o.
Radiographic Test
Non destructive test method, abreviation in accordance with norm EN4179 or NAS410
o.
Magnetic Test
Non destructive test method, abreviation in accordance with norm EN4179 or NAS410
o.
Ultrasonic Test
Non destructive test method, abreviation in accordance with norm EN4179 or NAS410
exp.
expression meaning "things never change"
v.
[subj: poiicemen] to herd [demonstrators] into a compact group in order to control their movements
n.
1. [Mil.] a pilot who comes in support of the leading aircraft. He is positionned besides and slightly behind the leading aircraft. 2. [Fig.] a person who helps a friend to approach potential partners
2. this meaning has been popularised by the TV series How I Met Your Mother
adj.
1. [Comp.] a device that once plugged in is automatically recognized by the system and launches the expected process without any action on the user's side; 2. [Bus.] a new employee who is able to start work without too much induction and training
[Comp.];[Bus.] can be used as both noun and adjective: plug and play device; plug and play employee or simply plug and play (noun)
adj.
[arch.] near in space, time or relation, almost (followed by: upon)
"nigh upon" is even stronger in keeping with an antiquated, even biblical style. "The end of the world is nigh upon us"
exp.
[as interjection] an expression of congratulations, thanks or respect
big up to the team for a great job
n.
[in Thailand] young male transsexual (often a sex worker)
adv.
extremely [with the idea of "abnormally"]
freakishly successful/large/lifelike
n.
[child] to be sent to a care organization run by the social services, or to be looked after by foster parents
n.
1. [Rel.] expression used to describe metaphorically a period of ignorance and spiritual crisis that precedes the communion with Divinity ; 2. in a larger meaning, it is used when refering to having a hard time, going through a phase of pessimism, sadness, failure etc.
exp.
defeat someone with arguments during a discussion; knock out [Fig.]
exp.
expression used for saying that someone is worth being kept close (as a friend, partner..)
n.
in American English, 'dirt' is what British people call 'soil' ('put some dirt in a plant pot'). In British English, dirt has the connotation of being dirty ('you've got some dirt on your shoe')
n.
a portmanteau of 'employer' and 'voyeurism'. signifies the act of searching for an employer or the practice of an employer when looking to fill positions. The term places an emphasis on the secretive connotation of the word 'voyeur', denoting a clandestine and thus superior form of employment search
[Tech.] Ex.: Employerism is what one must engage in, if one wishes to embark upon a more productive job hunt!
exp.
(metaphorically) manipulation attempt
His speech was nothing but smoke and mirrors
adj.
in modern usage, especially among young people, also used disparagingly to mean 'rubbish' or 'ridiculous'
that is so gay: c'est nase
exp.
You say 'top that!' when you have achieved something and you want to challenge other people to do better
I know four celebrities - top that!
exp.
When something is 'in the air', it means something exciting or significant is taking place or about to happen. Ex.: Spring is in the air - it's time for change!
n.
purple dye sprayed by a police water cannon to mark the demonstrators for arrest. The purple substance was dubbed 'purple rain' by the press after an anti-apartheid protest held in Cape Town on September 2, 1989.
n.
un bout d'essai
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"Collins English Dictionary 5th Edition first published in 2000 © HarperCollins Publishers 1979, 1986, 1991, 1994, 1998, 2000 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995"
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