The Collaborative International Dictionary of English v.0.48:

Proteose \Pro"te*ose`\, n. [Proteid + -ose.] (Physiol. Chem.)
   One of a class of soluble products formed in the digestion of
   proteids with gastric and pancreatic juice, and also by the
   hydrolytic action of boiling dilute acids on proteids.
   Proteoses are divided into the two groups, the primary and
   secondary proteoses.
   [Webster 1913 Suppl.]