| unstable colloid | A colloid that is not again soluble in water after having been dried at ordinary temperature. Synonym: unstable colloid. (05 Mar 2000) |
|---|---|
| 198Au colloid | A radioactive isotope of gold emitting negative beta particles and gamma radiation, with a half-life of 2.7 days; formerly used for irradiation of closed serous cavities in the palliative treatment of ascites and pleural effusion due to metastatic malignancies, and for liver scans. Synonym: 198Au colloid, colloidal radioactive gold. (05 Mar 2000) |
| lyophilic 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) |
| lyophobic 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) |
| acne | <dermatology> An inflammatory disease of the pilosebaceous unit, the specific type usually being indicated by a modifying term, frequently used alone to designate common acne or acne vulgaris. Origin: possibly Gr. Akm = a point or achn = chaff (15 Nov 1997) |
| acne albida | Acne caused by milia. (05 Mar 2000) |
| acne artificialis | Acne produced by external irritants, such as tar (chloracne), or drugs internally administered, such as iodides or bromides. Synonym: acne venenata. (05 Mar 2000) |
| acne bacillus | A bacteria isolated from normal skin, intestinal contents, wounds, blood, pus, and soft tissue abscesses. It is a common contaminant of clinical specimens, presumably from the skin of patients or attendants. (12 Dec 1998) |
| acne cachecticorum | Acne occurring in persons who have a debilitating constitutional disease; characterised by large, soft, purulent, ulcerative, cystic, and scarred lesions. (05 Mar 2000) |
| acne ciliaris | Follicular papules and pustules on the free edges of the eyelids. (05 Mar 2000) |
| acne conglobata | Severe cystic acne, characterised by cystic lesion, abscesses, communicating sinuses, and thickened, nodular scars; usually sparing the face. (05 Mar 2000) |
| acne cosmetica | Low-grade, non-inflammatory acne lesions from repeated application of comedogenic agents in cosmetics. (05 Mar 2000) |
| acne decalvans | A papular or pustular inflammation of the hair follicles of the scalp seen mostly in men, resulting in scarring and loss of hair in the affected area. Synonym: acne decalvans, alopecia follicularis. (05 Mar 2000) |
| acne erythematosa | acne rosacea |
| acne frontalis | A pyogenic infection involving follicles occurring chiefly on the forehead and temples; involution of the umbilicated and crusting lesions is followed by scar formation. Synonym: acne frontalis, acne necrotica. (05 Mar 2000) |