Definify.com
Webster 1913 Edition
Creatinin
Cre-at′i-nin
(kr?-?t′?-n?n)
, Noun.
(Physiol. Chem.)
A white, crystalline, nitrogenous body closely related to creatin but more basic in its properties, formed from the latter by the action of acids, and occurring naturally in muscle tissue and in urine.
[Written also
kretinine
.]