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Webster 1913 Edition

Noun.

(Physiol. Chem.)

A crystalline substance (

C5H5N5O

) contained in guano. It is also a constituent of the liver, pancreas, and other glands in mammals.

See also: guanin

Guanin n ‎(genitive Guanins, no plural)

See also: Guanin

guanin ‎(countable and uncountable, plural guanins)

guanin m