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

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.

A gelatinous substance found in colloid degeneration and colloid cancer.

Very small, insoluble non-diffusible solid or liquid particles that remain in suspension in a surrounding liquid. Solids usually on the order of 0.2 micron or less.