The Collaborative International Dictionary of English v.0.48:

Ovalbumin \O`val*bu"min\ ([=o]`v[a^]l*b[=u]"m[i^]n), Ovalbumen
\O`val*bu"men\ ([=o]`v[a^]l*b[=u]"m[e^]n), n. [Ovum + albumin.]
   (Physiol. Chem.)
   The albumin from white of eggs; egg albumin; -- in
   distinction from serum albumin. See Albumin.
   [1913 Webster]

WordNet (r) 3.0 (2006):

ovalbumin
    n 1: the white part of an egg; the nutritive and protective
         gelatinous substance surrounding the yolk consisting mainly
         of albumin dissolved in water; "she separated the whites
         from the yolks of several eggs" [syn: egg white, white,
         albumen, ovalbumin]