colloid

(redirected from Colloids)
Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to Colloids: Types of Colloids

colloid

 [kol´oid]
1. gluelike.
2. the translucent, yellowish, gelatinous substance resulting from colloid degeneration.
3. a chemical system composed of a continuous medium (the continuous phase) throughout which are distributed small particles, 1 to 1000 nm in size (the disperse phase), which do not settle out under the influence of gravity. Colloidal particles are not capable of passing through a semipermeable membrane, as in dialysis. Solutes that can pass through a semipermeable membrane are sometimes called crystalloids. adj., adj colloid´al.
dispersion colloid colloid (def. 3), particularly an unstable colloid system.
emulsion colloid lyophilic colloid
rarely, emulsion.
lyophilic colloid a stable colloid system in which the disperse phase is relatively liquid, usually comprising highly complex organic substances, such as glue or starch, which readily absorb solvent, swell, and distribute uniformly through the continuous phase.
lyophobic colloid an unstable colloid system in which the disperse phase particles tend to repel liquids, are easily precipitated, and cannot be redispersed with additional solvent.
stannous sulfur colloid a sulfur colloid containing stannous ions; complexed with technetium 99m it is used as a diagnostic aid (bone, liver, and spleen imaging).
suspension colloid lyophobic colloid.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

col·loid

(kol'oyd),
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.
2. Gluelike.
3. A translucent, yellowish, homogeneous material of the consistency of glue, less fluid than mucoid or mucinoid, found in the cells and tissues in a state of colloid degeneration. Synonym(s): colloidin
4. The stored secretion within follicles of the thyroid gland. For individual colloids not listed below, see the specific name.
[G. kolla, glue, + eidos, appearance]
Farlex Partner Medical Dictionary © Farlex 2012

colloid

(kŏl′oid′)
n.
1. 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.
2. The gelatinous stored secretion of the thyroid gland, consisting mainly of thyroglobulin.
3. Gelatinous material resulting from degeneration in diseased tissue.
adj.
Of, relating to, containing, or having the nature of a colloid.

col·loi′dal (kə-loid′l, kŏ-) adj.
col·loi′dal·ly adv.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

colloid

Chemistry
A liquid containing 1.0 mm to 1.0 nm microscopic and submicroscopic particles.

Physiology
The thyroglobulin-rich, homogeneous pale pink (by H&E stain) liquid which is secreted into the follicles by the thyroid cells
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

col·loid

(kol'oyd)
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
2. Gluelike.
3. A translucent, yellowish, homogeneous material of the consistency of glue, less fluid than mucoid or mucinoid, found in the cells and tissues in a state of colloid degeneration.
Synonym(s): colloidin.
4. The stored secretion within follicles of the thyroid gland.
[G. kolla, glue, + eidos, appearance]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

colloid

A substance in which particles are in suspension in a fluid medium. The particles are too small to settle by gravity or to be readily filtered. The colloid state lies between that of a solution and that of an emulsion.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

colloid

a mixture of two substances which are immiscible (see MISCIBLE), but where the particles of one are too small to settle out, and so remain suspended indefinitely. Glue is a colloid of animal gelatin in water; the water is defined as the matrix and the gelatin as the inclusion. Colloid particles measure 1 x 10-4 to 1 x 10-6 mm in diameter, forming either a SOL or GEL structure which does not diffuse through cell membranes. Colloids are common in cells, where their large surfaces are important for chemical changes constantly in progress there.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

col·loid

(kol'oyd)
Aggregates of atoms or molecules in a finely divided state, dispersed in a gaseous, liquid, or solid medium, and resisting sedimentation, diffusion, and filtration, thus differing from precipitates.
[G. kolla, glue, + eidos, appearance]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Use of colloids and blood components was defined separately and were included in total intravenous intake.
The TEM images of the as-synthesized gold colloids revealed the presence of well-defined spherical gold nanoparticles (Figure 1(a)) confirming that the here proposed synthesis method can generate in a very short period of time the spherical gold nanoparticles (AuNPs) coated with a uniform shell of PEG1000 molecules having a 3-5 nm thickness (Figure 1(b)).
Place of the colloids in fluid resuscitation of the traumatized patient.
This colloids (blood plasma) report also states import/export consumption, supply and demand Figures, cost, price, revenue and gross margins.
This energy gap, in addition to other parameters such as density difference in electrical charges and type and density of surface atoms, which are affected by the morphology of the particles, prevent the easily formation of a stable colloid. These parameters in addition to other obstacles such as the creation of stable chemical complexes in an uncontrolled situation prevents the formation of alumina nanoparticles in form of colloid, and therefore it is very important to select a certain method to obtain the desirable results.
High-density polyethylene (FIDPE) is the polymer that's mostly used for these ducts because of its relatively low Coefficient of Friction, and Colloids examined additive systems to reduce the CoF further.
This has prompted many investigators to think of other fluids like colloids and albumin for preloading.
Inspired by present status of both quantum plasma and complex plasma medium in semiconductors, in the current paper, we report, the analytical study of the wave spectrum of electrokinetic waves in colloids laden highly doped semiconductor at liquid nitrogen temperature and the effect of streaming carriers due to presence of strong dc electric field.
Further studies have shown that the prepared conducting PAM nanofiber without being dried can be directly dispersed in the near neuter (pH = 6.5) aqueous solution, and obtained the PAM nanofiber aqueous colloids. The aqueous colloids can be kept stable for about 60 days without any steric or electrostatic stabilizer (23).
Soil colloids are generally considered to be particles with effective diameters of around 10 nm to 10 [micro]m, with the smallest colloids just larger than dissolved macromolecules and the largest colloids being those that resist settling once suspended in soil pore water [23-25].
KNOWSLEY-BASED Colloids bounced back from a tough 2009 as its diversification strategy had a big impact on its top line.