| Clapton, Edward | <person> English physician, 1830-1909. See: Clapton's line. (05 Mar 2000) |
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| Clara cell | A rounded, club-shaped, nonciliated cell protruding between ciliated cell's in bronchiolar epithelium; believed to be secretory in function. Synonym: bronchiolar exocrine cell. (05 Mar 2000) |
| Clara, Max | <person> Austrian anatomist, *1899. See: Clara cell. (05 Mar 2000) |
| clarificant | An agent that makes a turbid liquid clear. Origin: L. Clarus, clear, + facio, to make (05 Mar 2000) |
| clarification | The process of making a turbid liquid clear. Synonym: lucidification. (05 Mar 2000) |
| clarifier | A tank used to remove solids by gravity, to remove colloidal solids by coagulation, and to remove floating oil and scum through skimming. (05 Dec 1998) |
| clarithromycin | <drug> An antibiotic approved for the treatment of MAC and also used for preventing this disease in people with AIDS. Side effects include diarrhoea, nausea and abnormal taste. Clarithromycin may cause severe abdominal pain at high doses. (09 Oct 1997) |
| Clark electrode | An oxygen electrode consisting of the tip of a platinum wire exposed to a thin film of electrolyte covered by a plastic membrane permeable to oxygen but not to water or the electrolyte. When a certain voltage is applied, oxygen is destroyed at the platinum surface; the flow of current is then proportional to the rate at which oxygen can diffuse to the platinum surface from the gas or liquid sample outside the membrane, and is thus a measure of the oxygen pressure in the sample; commonly used to measure oxygen pressure in arterial blood samples. (05 Mar 2000) |
| Clark's level | The level of invasion of primary malignant melanoma of the skin; limited to the epidermis, I; into the underlying papillary dermis, II; to the junction of the papillary and reticular dermis, III; into the reticular dermis, IV; into the subcutaneous fat, V. The prognosis is worse with each successive deeper level of invasion. (05 Mar 2000) |
| Clark's weight rule | An obsolete rule for an approximate child's dose, obtained by dividing the child's weight in pounds by 150 and multiplying the result by the adult dose. (05 Mar 2000) |
| Clark, Alonzo | <person> U.S pharmacologist, 1807-1887. See: Clark's weight rule. (05 Mar 2000) |
| Clark, Eliot | <person> U.S. Anatomist, 1881-1963. See: Sandison-Clark chamber. (05 Mar 2000) |
| Clark, Leland Jr | <person> U.S. Biochemist, *1918. See: Clark electrode. (05 Mar 2000) |
| Clark, Wallace Jr | <person> U.S. Dermatopathologist, *1924. See: Clark's level. (05 Mar 2000) |
| Clarke cells | Large multipolar cells characteristic of the thoracic nucleus (Clarke's nucleus in lamina VII) of the spinal cord. (05 Mar 2000) |