1) Acid 2) Cyanamid 1) Cyanamid 
<chemical> Cyanamide (h2ncn). A cyanide compound which has been used as a fertiliser, defoliant and in many manufacturing processes. It often occurs as the calcium salt, sometimes also referred to as cyanamide. The citrated calcium salt is used in the treatment of alcoholism. ... Chemical name: Cyanamide ... (12 Dec 1998) ... 
Type: Term Pronunciation: sī-an′i-mīd Definitions: 1. An irritating and caustic water-soluble substance, H2NCN or HN=C=NH; often used in reference to calcium cyanamide.
Cyanamide is a colourless crystalline substance. It is the amide of cyanic acid and is prepared by the interaction of ammonia and cyanogen chloride.
[n] - a weak soluble dibasic acid (the parent acid of cyanamide salts)
cyanamid noun a weak soluble dibasic acid (the parent acid of cyanamide salts)
a white, crystalline, unstable, deliquescent solid, CHN, usually produced by the action of ammonia on cyanogen chloride or by the action of sulfuric acid on calcium cyanamide. · (not in technical use) See