Source : Webster's Revised Unabridged Dictionary (1913)

Globulin \Glob"u*lin\, n. [From {Globule}: cf. F. globuline.]
   (Phisiol. Chem.)
   An albuminous body, insoluble in water, but soluble in dilute
   solutions of salt. It is present in the red blood corpuscles
   united with h[ae]matin to form h[ae]moglobin. It is also
   found in the crystalline lens of the eye, and in blood serum,
   and is sometimes called crystallin. In the plural the word is
   applied to a group of proteid substances such as vitellin,
   myosin, fibrinogen, etc., all insoluble in water, but soluble
   in dilute salt solutions.

Source : WordNet®

globulin
     n : a family of proteins found in blood and milk and muscle and
         in plant seed