The Collaborative International Dictionary of English v.0.48:

Albuminoid \Al*bu"mi*noid\, a. [L. albumen + -oid.] (Chem.)
   Resembling albumin. -- n. One of a class of organic
   principles (called also proteids) which form the main part
   of organized tissues. --Brunton.
   [1913 Webster]

WordNet (r) 3.0 (2006):

albuminoid
    n 1: a simple protein found in horny and cartilaginous tissues
         and in the lens of the eye [syn: scleroprotein,
         albuminoid]