biotin \bi"otin\ n.
   a b vitamin c10h16n2o3s that aids in body growth; --
   called also vitamin h and coenzyme r. it functions as a
   coenzyme in many carboxylation reactions.

   note: biotin binds tightly to the substance avidin, found in
         raw egg-whites. rats or chick on a diet high in raw
         egg-white may develop skin lesions and retarded growth,
         which can be prevented by adding biotin to the diet.
         --mi11

   syn: .
        wordnet 1.5 +pjc
see also:
c10h16n2o3s vitamin h coenzyme r