- 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.
Mayonnaise is a colloid.
- 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 of colloid; from Classical Greek kolla, glue + -oid; coined by T. Graham (1805-69), Scottish chemist
- Chemistry a. A system in which finely divided particles, which are approximately 1 to 1,000 millimicrons 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.
- The gelatinous stored secretion of the thyroid gland, consisting mainly of thyroglobulin.
- Gelatinous material resulting from degeneration in diseased tissue.
Of, relating to, containing, or having the nature of a colloid.
- (chemistry) A stable system of two phases, one of which is dispersed in the other in the form of very small droplets or particles.
- (meteorology) An intimate mixture of two substances one of which, called the dispersed phase (colloid), is uniformly distributed in a finely divided state throughout the second substance, called the dispersion medium (dispersing medium). The dispersion medium may be a gas, a liquid, or a solid, and the dispersed phase may also be any of these, with the exception that one does not speak of a colloidal system of one gas in another. A system of liquid or solid particles colloidally dispersed in a gas is called an aerosol. A system of solid substances or water-insoluble liquids colloidally dispersed in liquid water is called a hydrosol.
- (geology) A particle less than 1 micron in diameter, following the Wentworth scale
From French colloïde, from Ancient Greek κόλλα (kolla, “glue”) + -oid.