| crassamentum | 1. Old term for blood clot. 2. Old term for coagulum. Origin: L. Thickness, fr. Crassus, thick (05 Mar 2000) |
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| Crassulacean acid metabolism | <plant biology> Physiological adaptation of certain succulent plants, in which carbon dioxide can be fixed (nonphotosynthetically) at night into malic and other acids. During the day the carbon dioxide is regenerated and then fixed photosynthetically into the Calvin Benson cycle. This adaptation permits the stomata to remain closed during the day, conserving water. (18 Nov 1997) |
| crater | The most depressed, usually central portion of an ulcer. (05 Mar 2000) |
| crater arc | An arc of a direct current that forms a pitlike excavation at the positive pole. (05 Mar 2000) |
| crateriform | Hollowed like a bowl or a saucer. Origin: L. Crater, bowl, + forma, shape (05 Mar 2000) |
| craterization | Excavation of tissue to form a shallow depression, performed in wound treatment to facilitate drainage from infected areas. Synonym: craterization. (05 Mar 2000) |
| cravat bandage | A bandage made by bringing the point of a triangular bandage to the middle of the base and then folding lengthwise to the desired width. (05 Mar 2000) |
| craw-craw | A term applied in west Africa to a pruritic papular skin eruption, which may lead to ulceration; some cases are caused by Onchocerca. Synonym: kra-kra. (05 Mar 2000) |
| Crawford, Brian | <person> British physicist, *1906. See: Stiles-Crawford effect. (05 Mar 2000) |
| crayfish | Various freshwater crustaceans resembling the lobster, but usually much smaller; common genera are astacus, cambarus, oronectes, and pacifastacus. It includes crayfish as food. (12 Dec 1998) |
| crazing | In dentistry, the appearance of minute cracks on the surface of plastic restorations such as filling materials, denture teeth, or denture bases. (05 Mar 2000) |
| crazy chick disease | A disease of young chicks caused by vitamin E deficiency. Synonym: crazy chick disease. (05 Mar 2000) |