- reversible hydrocolloid
- a hydrocolloid that can be reverted from the gel to the sol condition by increase in temperature; a common example is agar.
Medical dictionary. 2011.
Medical dictionary. 2011.
hydrocolloid — A gelatinous colloid in unstable equilibrium with its contained water, useful in dentistry for impressions because of its dimensional stability under controlled conditions. irreversible h. a h. whose physical state is changed by an irreversible … Medical dictionary
Colloid — Milk is an emulsified colloid of liquid butterfat globules dispersed within a water based solution. A colloid is a substance microscopically dispersed evenly throughout another substance.[1] A colloidal system consists of two separate phases: a… … Wikipedia
agar — A complex polysaccharide (a sulfated galactan) derived from seaweed (various red algae); used as a solidifying agent in culture media; it has the valuable property of melting at 100°C, but not solidifying until 49°C. [Bengalese] bile salt a. an a … Medical dictionary
hysteresis — 1. Failure of either one of two related phenomena to keep pace with the other; or any situation in which the value of one depends upon whether the other has been increasing or decreasing. 2. The lag of a magnetic effect behind its cause. SYN:… … Medical dictionary
colloid — 1. Aggregates of atoms or molecules in a finely divided state (submicroscopic), dispersed in a gaseous, liquid, or solid medium, and resisting sedimentation, diffusion, and filtration, thus differing from precipitates. SEE ALSO: hydrocolloid … Medical dictionary
impression — 1. A mark seemingly made by pressure of one structure or organ on another, seen especially in cadaveric dissections. See also groove for the various impressions of the lungs, e.g., descending aorta, subclavian artery, and vena cavae. 2. An … Medical dictionary