Source : Webster's Revised Unabridged Dictionary (1913)

Proteid \Pro"te*id\, n.

   {Defensive proteid} (Physiol. Chem.), one of a class of
      proteid substances, present in some animal tissues and
      fluids, that make the body immune to certain infectious
      diseases by destroying or rendering inactive the toxic
      products of bacterial growth.

Proteid \Pro"te*id\, n. [Gr. prw^tos first.] (Physiol. Chem.)
   One of a class of amorphous nitrogenous principles,
   containing, as a rule, a small amount of sulphur; an
   albuminoid, as blood fibrin, casein of milk, etc. Proteids
   are present in nearly all animal fluids and make up the
   greater part of animal tissues and organs. They are also
   important constituents of vegetable tissues. See 2d Note
   under {Food}. -- {Pro"te*id}, a.

Proteid \Pro"te*id\, n. [Gr. prw^tos first.] (Physiol. Chem.)
   One of a class of amorphous nitrogenous principles,
   containing, as a rule, a small amount of sulphur; an
   albuminoid, as blood fibrin, casein of milk, etc. Proteids
   are present in nearly all animal fluids and make up the
   greater part of animal tissues and organs. They are also
   important constituents of vegetable tissues. See 2d Note
   under {Food}. -- {Pro"te*id}, a.