1. A suspension of finely divided particles in a continuous medium in which the particles are approximately 5 to 5,000 angstroms in size, do not settle out of the substance rapidly, and are not readily filtered. 2. The particulate matter so suspended. 3. The gelatinous product of the thyroid gland, consisting mainly of thyroglobulin, which serves as the precursor and storage form of thyroid hormone. 4. Gelatinous material resulting from colloid degeneration in diseased tissue. 5. Of, relating to, containing, or having the nature of a colloid.
