Source : Webster's Revised Unabridged Dictionary (1913)

Albumin \Al*bu"min\, n. (Chem.)
   A thick, viscous nitrogenous substance, which is the chief
   and characteristic constituent of white of eggs and of the
   serum of blood, and is found in other animal substances, both
   fluid and solid, also in many plants. It is soluble in water
   and is coagulated by heat and by certain chemical reagents.

Source : WordNet®

albumin
     n : a simple water-soluble protein found in many animal tissues
         and liquids [syn: {albumen}]