| cooperativity model | A model used to explain the property of cooperativity observed in certain enzymes; e.g., allosterism or hysteresis. (05 Mar 2000) |
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| Cooperia | A genus of small, slender nematodes (family Trichostrongylidae) inhabiting the small intestine, rarely the abomasum, of ruminants; when fresh they are a bright pink colour; they produce serious effects only when present in large numbers. In partly immune animals, these worms become enclosed in nodules in the wall of the intestine; they are less pathogenic in sheep and goats than the trichostrongyles Haemonchus, Ostertagia, and Trichostrongylus. (05 Mar 2000) |
| Cooperia bisonis | Species that occurs in cattle, sheep, bison, and pronghorn antelopes. (05 Mar 2000) |
| Cooperia curticei | Species that occurs in sheep, goats, and wild deer in Europe, although cosmopolitan in distribution. (05 Mar 2000) |
| Cooperia fieldingi | Species that occurs mainly in cattle, less commonly in sheep, water buffalo, and several wild ruminants; although worldwide in distribution, it is especially widespread in North America and common in Hawaii. Synonym: Cooperia fieldingi. (05 Mar 2000) |
| Cooperia oncophora | Species that occurs in cattle and domestic and wild sheep, but rarely in the horse; although worldwide in distribution, it is most common in the northern U.S. And Canada. Synonym: Strongylus radiatus, Strongylus ventricosus. (05 Mar 2000) |
| Cooperia pectinata | Species that occurs in cattle, sheep, water buffalo, dromedary camels, and various wild ruminants; it is common in the southern U.S. (05 Mar 2000) |
| Cooperia punctata | Species that occurs mainly in cattle, less commonly in sheep, water buffalo, and several wild ruminants; although worldwide in distribution, it is especially widespread in North America and common in Hawaii. Synonym: Cooperia fieldingi. (05 Mar 2000) |
| Cooperia spatulata | A species that occurs in cattle and sheep in the southern U.S., Kenya, Australia, and Malaysia. (05 Mar 2000) |
| Coopernail's sign | <clinical sign> In fracture of the pelvis, occurrence of ecchymosis of the perineum and scrotum, or labia. (05 Mar 2000) |
| Coopernail, George | <person> U.S. Surgeon, *1876. See: Coopernail's sign. (05 Mar 2000) |
| cooperos ligaments | Flexible bands of tissue that pass from the chest muscle between the lobes of the breasts, providing shape and support the breasts. (09 Oct 1997) |
| coordinate | 1. Any of the scales or magnitudes that serve to define the position of a point. 2. To perform the act of coordination. Origin: see coordination (05 Mar 2000) |
| coordinate convulsion | A clonic convulsion in which the movements are seemingly purposeful, being exaggerations of those that may occur naturally. (05 Mar 2000) |
| coordinate covalent bond | A bond in which the two electrons shared by a pair of atoms belonged originally to only one of the atoms; often represented by a small arrow pointing toward the electron receiver; e.g., nitric acid, O(OH)N→O; phosphoric acid, (OH)3P→O. Synonym: coordinate covalent bond. (05 Mar 2000) |