[gwan-i-deen, -din, gwah-ni-]

noun Chemistry.

a colorless, crystalline, strongly alkaline, water-soluble solid, CH5N3, used chiefly in the manufacture of plastics, resins, rubber accelerators, and explosives.

Origin of guanidine

First recorded in 1860–65; guan(o) + -id3 + -ine2
Also called carbamidine, iminourea. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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Historical Examples of guanidine

British Dictionary definitions for guanidine


guanidin (ˈɡwɑːnɪdɪn, ˈɡwænɪ-)


a strongly alkaline crystalline substance, soluble in water and found in plant and animal tissues. It is used in organic synthesis. Formula: HNC(NH 2) 2Also called: carbamidine, iminourea

Word Origin for guanidine

C19: from guano + -id ³ + -ine ²
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012