cyanide

[sahy-uh-nahyd, -nid]
noun
1.
Also, cyanid [sahy-uh-nid] . Chemistry.
a.
a salt of hydrocyanic acid, as potassium cyanide, KCN.
b.
a nitrile, as methyl cyanide, C 2 H 3 N.
verb (used with object), cyanided, cyaniding.
2.
to treat with a cyanide, as an ore in order to extract gold.

Origin:
1820–30; cyan-3 + -ide

subcyanid, noun
subcyanide, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
cyanide or cyanid (ˈsaɪəˌnaɪd, ˈsaɪənɪd)
 
n
1.  any salt of hydrocyanic acid. Cyanides contain the ion CN-- and are extremely poisonous
2.  another name (not in technical usage) for nitrile
 
cyanid or cyanid
 
n
 
cyani'dation or cyanid
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

cyanide
1826, coined from cyan-, comb. form for carbon and nitrogen compounds, from Gk. kyanos "dark blue enamel, lapis lazuli" (see cyan) + chemical ending -ide. So called because it first had been obtained by heating the dye pigment powder known as Prussian blue (see Prussian).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

cyanide cy·a·nide (sī'ə-nīd') or cy·a·nid (-nĭd)
n.
Any of various salts or esters of hydrogen cyanide containing a CN group, especially the extremely poisonous compounds potassium cyanide and sodium cyanide.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
cyanide   (sī'ə-nīd')  Pronunciation Key 
Any of a large group of chemical compounds containing the radical CN, especially the very poisonous salts sodium cyanide and potassium cyanide. Cyanides are used to make plastics and to extract and treat metals.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The new business proved more lucrative than sneaking cyanide to the coral reefs.
Many poor fishermen add to reef destruction by using cyanide to stun and
  capture live fish for the aquarium trade.
But within months it was ordered to shut down after twice spilling cyanide into
  local waterways.
And extracting it from this rock often means leaching it out with cyanide.
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