Colloid

a.
  1. Resembling glue or jelly; characterized by a jellylike appearance; gelatinous; as, colloid tumors.

n.
  1. (Physiol. Chem.) A substance (as albumin, gum, gelatin, etc.) which is of a gelatinous rather than a crystalline nature, and which diffuses itself through animal membranes or vegetable parchment more slowly than crystalloids do; -- opposed to crystalloid.
  2. (Med.) A gelatinous substance found in colloid degeneration and colloid cancer.
  3. Styptic colloid (Med.),
    a preparation of astringent and antiseptic substances with some colloid material, as collodion, for ready use.