from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Chemistry 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.
- n. Chemistry The particulate matter so dispersed.
- n. Physiology The gelatinous product of the thyroid gland, consisting mainly of thyroglobulin, which serves as the precursor and storage form of thyroid hormone.
- n. Pathology Gelatinous material resulting from colloid degeneration in diseased tissue.
- adj. Of, relating to, containing, or having the nature of a colloid.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Glue-like.
- n. A stable system of two phases, one of which is dispersed in the other in the form of very small droplets or particles.
- n. An intimate mixture of two substances one of which, called the dispersed phase (or colloid), is uniformly distributed in a finely divided state throughout the second substance, called the dispersion medium (or 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.
- n. A particle less than 1 micron in diameter, following the Wentworth scale
from the GNU version of the Collaborative International Dictionary of English
- adj. Resembling glue or jelly; characterized by a jellylike appearance; gelatinous.
- n. 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.
- n. A gelatinous substance found in colloid degeneration and colloid cancer.
from The Century Dictionary and Cyclopedia
- Like glue or jelly.
- In geology, partly amorphous: applied to minerals.
- n. A substance in a peculiar state of aggregation characterized by slow diffusibility, permeability by crystalloid solutions, etc. See extract.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a mixture with properties between those of a solution and fine suspension
When the secreting elements increase out of proportion to the stroma, numerous rounded or irregular spaces filled with a thick yellow colloid material are formed in the substance of the goitre -- _colloid goitre_.
Early work in colloid chemistry had also been carried out by Wolfgang Ostwald, son of the 1909 Laureate Wilhelm Ostwald, but this was not of a caliber earning him a Nobel Prize.
If the mass concentration of the colloid is known, it is easy to obtain the mass of the particles, and from this - assuming, for example, a spherical shape and normal specific gravity - the size can be calculated.
(A colloid is a stable suspension of silver particles in water.)
In passing it may be mentioned that the name colloid originates precisely from kolla, the Greek word for glue.
There is no life without chemical reactions, and yet chemical reaction is not life; there is no life without what biologists call the colloid state, and yet the colloid state is not life.
Such mastication appears to liberate the ouabain from the bark and mix it with saliva to form a coarse colloid, which is then specifically applied only to the lateral line hairs.
Mucinous breast cancer, also known as colloid carcinoma, is a rare type of invasive breast cancer formed by mucus-producing cancer cells.
Maternal colloid osmotic pressure after fetal surgery.
Regular bathing with plain shampoo or with products like oatmeal colloid can help in reducing itching by removing pollen grains and potential toxins from the skin.