adj. Resembling glue or jelly; characterized by a jellylike appearance; gelatinous; as, colloid tumors.
- n. (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.
- (Med.) A gelatinous substance found in colloid degeneration and colloid cancer. Styptic colloid (Med.), a preparation of astringent and antiseptic substances with some colloid material, as collodion, for ready use.