| copper sulphate | CuSo4-5H2O;it is highly poisonous to algae, is a prompt and active emetic, and is used as an irritant, astringent, and fungicide. Synonym: copper sulfate, copper sulphate. (05 Mar 2000) |
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| copper-64 | Beta and positron emitter with a half-life of 12.82 hr. Used in the study of Wilson's disease and in brain scans for tumours. (05 Mar 2000) |
| copper-67 | Beta and gamma emitter with a half-life of 2.580 days. (05 Mar 2000) |
| copperas | The impure commercial variety of ferrous sulfate. (05 Mar 2000) |
| copperhead | A poisonous snake of the genus Denisonia in Australia and Agkistrodon in the U.S. (05 Mar 2000) |
| Coppet's law | Solutions having the same freezing point have equal concentrations of dissolved substances. (05 Mar 2000) |
| Coppet, Louis de | <person> French physicist, 1841-1911. See: Coppet's law. (05 Mar 2000) |
| coppice regeneration | The ability of certain hardwood species to regenerate by producing multiple new shoots from a stump left after harvest. (05 Dec 1998) |