Definitions for guanidineˈgwæn ɪˌdin, -dɪn, ˈgwɑ nɪ-
Random House Webster's College Dictionary
guan•i•dineˈgwæn ɪˌdin, -dɪn, ˈgwɑ nɪ-(n.)
a crystalline, alkaline, water-soluble solid, CH5N3, used in making plastics, resins, and explosives.
Origin of guanidine:
1860–65; guan (o ) + -idine
A strong base HN=C(NH) obtained by the oxidation of guanine
a strongly alkaline base, CN3H5, formed by the oxidation of guanin, and also obtained combined with methyl in the decomposition of creatin. Boiled with dilute sulphuric acid, it yields urea and ammonia
U.S. National Library of Medicine
A strong organic base existing primarily as guanidium ions at physiological pH. It is found in the urine as a normal product of protein metabolism. It is also used in laboratory research as a protein denaturant. (From Martindale, the Extra Pharmacopoeia, 30th ed and Merck Index, 12th ed) It is also used in the treatment of myasthenia and as a fluorescent probe in HPLC.