[gwan-i-deen, -din, gwah-ni-]
noun Chemistry.
a colorless, crystalline, strongly alkaline, water-soluble solid, CH 5 N 3 , used chiefly in the manufacture of plastics, resins, rubber accelerators, and explosives.
Also called carbamidine, iminourea.

1860–65; guan(o) + -id3 + -ine2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
guanidine or guanidin (ˈɡwɑːnɪˌdiːn, -dɪn, ˈɡwænɪ-, ˈɡwɑːnɪdɪn, ˈɡwænɪ-)
carbamidine, Also called: iminourea a strongly alkaline crystalline substance, soluble in water and found in plant and animal tissues. It is used in organic synthesis. Formula: HNC(NH2)2
[C19: from guano + -id³ + -ine²]
guanidin or guanidin
[C19: from guano + -id³ + -ine²]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
Guanidine does not appear to be absorbed through the skin.
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