Creatin

from WordNet (r) 3.0 (2006)

creatin
    n 1: an amino acid that does not occur in proteins but is found
         in the muscle tissue of vertebrates both in the free form
         and as phosphocreatine; supplies energy for muscle
         contraction [syn: {creatine}, {creatin}]

from The Collaborative International Dictionary of English v.0.48

Creatin \Cre"a*tin\ (kr?"?-t?n), n. [Gr. ??? flesh.] (Physiol.
   Chem.)
   A white, crystalline, nitrogenous substance found abundantly
   in muscle tissue. [Written also {kreatine}.]
   [1913 Webster]

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