- The definition of a colloid is a combination of molecules mixed through other substances that will not settle out or join with the other substance.
Mayonnaise and blood are both examples of colloids.
- a solid, liquid, or gaseous substance made up of very small, insoluble particles (as single large molecules or masses of smaller molecules) that remain in suspension in a surrounding solid, liquid, or gaseous medium of different matter
- a state of matter consisting of such a substance dispersed in a surrounding medium: all living matter contains colloidal material, and a colloid has only a negligible effect on the freezing point, boiling point, or vapor pressure of the surrounding medium
- the iodine-containing, gelatinous protein stored in the thyroid
Origin: ; from Classical Greek kolla, glue plush -oid; coined by T. Graham (1805-69), Scottish chemist
Used by arrangement with John Wiley & Sons, Inc.
- Chemistry a. A system in which finely divided particles, which are approximately 10 to 10,000 angstroms in size, are dispersed within a continuous medium in a manner that prevents them from being filtered easily or settled rapidly.b. The particulate matter so dispersed.
- Physiology The gelatinous product of the thyroid gland, consisting mainly of thyroglobulin, which serves as the precursor and storage form of thyroid hormone.
- Pathology Gelatinous material resulting from colloid degeneration in diseased tissue.
- col·loiˈdal adjective
- col·loiˈdal·ly adverb
colloid - Cultural Definition
A substance made up of particles that are larger than most molecules; these particles do not actually dissolve in substances but stay suspended in them.
- Fog, paints, and foam rubber are colloids.
colloid - Medical Definition
- A suspension of finely divided particles in a continuous medium from which the particles do not settle out rapidly and are not readily filtered.
- The particulate matter so suspended.
- The gelatinous stored secretion of the thyroid gland, consisting mainly of thyroglobulin.
- Gelatinous material resulting from colloid degeneration in diseased tissue. Also called colloidin.
- colloidal adjective
colloid - Science Definition
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