Chemistry. a ductile, bluish-white metallic element: used in making galvanized iron, brass, and other alloys, and as an element in voltaic cells. Symbol: Zn; atomic weight: 65.37; atomic number: 30; specific gravity: 7.14 at 20°C.
a piece of this metal used as an element in a voltaic cell.
verb (used with object), zincked or zinced [zingkt] , zincking or zincing [zing-king] .
to coat or cover with zinc.

1635–45; < German Zink, perhaps derivative of Zinke(n) prong, tine, from the spikelike form it takes in a furnace

zincky, zincy, zinky, adjective
zincoid, adjective
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World English Dictionary
zinc (zɪŋk)
1.  a brittle bluish-white metallic element that becomes coated with a corrosion-resistant layer in moist air and occurs chiefly in sphalerite and smithsonite. It is a constituent of several alloys, esp brass and nickel-silver, and is used in die-casting, galvanizing metals, and in battery electrodes. Symbol: Zn; atomic no: 30; atomic wt: 65.39; valency: 2; relative density: 7.133; melting pt: 419.58°C; boiling pt: 907°C
2.  informal corrugated galvanized iron
[C17: from German Zink, perhaps from Zinke prong, from its jagged appearance in the furnace]

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Word Origin & History

1651, from Ger. Zink, perhaps related to Zinke "prong, point;" said to have been used first by Paracelsus (c.1526) on analogy of the form of its crystals after smelting. Zinke is from O.H.G. zint "a point, jag," from P.Gmc. *tindja "tine" (cf. O.N. tindr "point, top, summit," O.E. tind "prong, spike;"
cf. tine).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

zinc (zĭngk)
Symbol Zn
A metallic element that is brittle at room temperature but becomes malleable when heated. Atomic number 30; atomic weight 65.39; melting point 419.5°C; boiling point 907°C; specific gravity 7.133 (25°C); valence 2.

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American Heritage
Science Dictionary
zinc   (zĭngk)  Pronunciation Key 
Symbol Zn
A shiny, bluish-white metallic element that is brittle at room temperature but is malleable when heated. It is used in alloys such as brass and bronze, as a coating for iron and steel, and in various household objects. Zinc is essential to human and animal growth. Atomic number 30; atomic weight 65.39; melting point 419.4°C; boiling point 907°C; specific gravity 7.133 (25°C); valence 2. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Zinc is an important trace mineral that people need to stay healthy.
Scientists still haven't discovered a cure for the common cold, but researchers
  now say zinc may be the next best thing.
Bacitracin zinc is a medicine applied to cuts and other skin wounds to help
  prevent infection.
My column this week mentions a fair amount of scientific information about zinc
  in denture cream.
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