Source : Webster's Revised Unabridged Dictionary (1913)

Aleurone \A*leu"rone\, n. [Gr. ? flour.] (Bot.)
   An albuminoid substance which occurs in minute grains
   (``protein granules'') in maturing seeds and tubers; --
   supposed to be a modification of protoplasm.

Source : WordNet®

aleurone
     n : granular protein in outermost layer of endosperm of many
         seeds or cereal grains