- Physical Chemistry. a substance made up of a system of particles with linear dimensions in the range of about 10−7 to 5 × 10−5 cm dispersed in a continuous gaseous, liquid, or solid medium whose properties depend on the large specific surface area. The particles can be large molecules like proteins, or solid, liquid, or gaseous aggregates and they remain dispersed indefinitely.Compare aerosol, emulsion, gel, sol4, suspension.
- Medicine/Medical. a colloidal substance in the body, as a stored secretion or a cyst.
- Physical Chemistry. colloidal.
Origin of colloid
Examples from the Web for colloid
Captain Purnall wrenches open the colloid to talk with him man to man.
Then the Sun rises and through the colloid strikes out our lamps.
Yet another phenomenon of colloid chemistry is concerned, viz.Animal Proteins
Hugh Garner Bennett
All of the coats of the stomach are converted into the colloid growth.
"It would have to be a colloid, too, capable of suspension in the atmosphere," said Ken.The Year When Stardust Fell
Raymond F. Jones
- Also called: colloidal solution, colloidal suspension a mixture having particles of one component, with diameters between 10 –7 and 10 –9 metres, suspended in a continuous phase of another component. The mixture has properties between those of a solution and a fine suspension
- the solid suspended phase in such a mixture
- obsolete a substance that in solution does not penetrate a semipermeable membraneCompare crystalloid (def. 2)
- physiol a gelatinous substance of the thyroid follicles that holds the hormonal secretions of the thyroid gland
- pathol of or relating to the gluelike translucent material found in certain degenerating tissues
- of, denoting, or having the character of a colloid
Word Origin and History for colloid
1847, from French colloide (1845), from Greek kolla "glue" + -oeides "form" (see -oid).
- 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.colloidin
- Of, relating to, containing, or having the nature of a colloid.
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.