| colloid goiter | A form of goiter in which the contents of the follicles increase greatly, causing pressure atrophy of the epithelium so that the gelatinous matter predominates in the tumour. Synonym: struma colloides. (05 Mar 2000) |
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| colloid milium | Yellow papules developing in sun-damaged skin of the head and backs of the hands, composed of colloid material in the dermis resembling amyloid but with a different ultrastructure. Synonym: colloid acne, colloid pseudomilium, elastosis colloidalis conglomerata. Origin: L. Milium, millet (05 Mar 2000) |
| colloid pseudomilium | Yellow papules developing in sun-damaged skin of the head and backs of the hands, composed of colloid material in the dermis resembling amyloid but with a different ultrastructure. Synonym: colloid acne, colloid pseudomilium, elastosis colloidalis conglomerata. Origin: L. Milium, millet (05 Mar 2000) |
| colloid system | A combination of the two phases, internal and external, of a colloid solution; the various system's are: gas + liquid (foam); gas + solid (meerschaum); liquid + gas (fog); solid + gas (smoke); solid + liquid (sol); liquid + solid (gel); liquid + liquid (emulsion); solid + solid (coloured glass). (05 Mar 2000) |
| colloid theory of narcosis | That coagulation or flocculation of protein causes dehydration and reduction of metabolism. (05 Mar 2000) |
| protective colloid | A colloid that has the power of preventing the precipitation of suspensoids under the influence of an electrolyte. (05 Mar 2000) |
| hydrophilic colloid | A colloidal dispersion in which the dispersed particles are more or less liquid and exert a certain attraction on and absorb a certain quantity of the fluid in which they are suspended. Synonym: emulsion colloid, hydrophil colloid, hydrophilic colloid, lyophilic colloid. (05 Mar 2000) |
| hydrophobic colloid | A colloidal solution in which the disperse particles are solid and lyophobe or hydrophobe, and are therefore sharply demarcated from the fluid in which they are suspended. Synonym: hydrophobic colloid, lyophobic colloid, suspension colloid. Origin: suspension + G. Eidos, resemblance (05 Mar 2000) |
| stable colloid | A colloid that is again soluble in water after having been dried at ordinary temperature. Synonym: stable colloid. (05 Mar 2000) |
| styptic colloid | Tannic acid in flexible collodion; an astringent and local haemostatic. Synonym: haemostatic collodion, styptic colloid, xylostyptic ether. (05 Mar 2000) |
| suspension colloid | A colloidal solution in which the disperse particles are solid and lyophobe or hydrophobe, and are therefore sharply demarcated from the fluid in which they are suspended. Synonym: hydrophobic colloid, lyophobic colloid, suspension colloid. Origin: suspension + G. Eidos, resemblance (05 Mar 2000) |
| dispersion colloid | A colloidal solution in which the dispersed phase can be concentrated by centrifugation. Synonym: dispersion colloid, molecular dispersed solution. (05 Mar 2000) |
| irreversible colloid | A colloid that is not again soluble in water after having been dried at ordinary temperature. Synonym: unstable colloid. (05 Mar 2000) |
| technetium tc 99m sulfur colloid | <chemical> A gamma-emitting radionuclide imaging agent used for the diagnosis of diseases in many tissues, particularly in the gastrointestinal system, liver, and spleen. Pharmacological action: radiopharmaceuticals. (12 Dec 1998) |
| thyroid colloid | The semifluid material that occupies the lumen of thyroid follicles; it contains thyroglobulin mainly. (05 Mar 2000) |