Definition of guanidine in English:


Line breaks: guan|idine
Pronunciation: /ˈɡwɑːnɪdiːn


[mass noun] Chemistry
A strongly basic crystalline compound, used in organic synthesis.
  • An imide derived from urea; chemical formula: HNC(NH2)2
More example sentences
  • Although a molecule of guanidine contains only five hydrogen atoms, it can effectively store nine by extracting hydrogen from the water recovered from the exhaust.
  • However, experience with guanidine and biguanides prompted the development of metformin.
  • When guanidine hydrochloride is present these complexes dissociate into smaller units.


mid 19th century: from guano + -ide + -ine4.

Definition of guanidine in:

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