| chrome-cobalt alloys | Alloy's of cobalt and chromium containing molybdenum and/or tungsten plus trace elements; used in dentistry for denture bases and frameworks, and other structures. (05 Mar 2000) |
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| cobalt | <chemical> A trace element that is a component of vitamin b12. It has the atomic symbol co, atomic number 27, and atomic weight 58.93. It is used in nuclear weapons, alloys, and pigments. Deficiency in animals leads to anaemia; its excess in humans can lead to erythrocytosis. Chemical name: Cobalt (12 Dec 1998) |
| cobalt-57 | <radiobiology> A radioisotope with a half-life of 271.8 days. It decays by electron capture with emission of a medium energy (122.06 keV) gamma ray. Used as a diagnostic aid with some metabolic disorders. (17 Jul 2002) |
| cobalt-58 | <radiobiology> Positron emitter with half-life of 70.88 days. (05 Mar 2000) |
| cobalt-60 | <radiobiology> A radioisotope with a half-life of 5.271 years. It emits beta particles and energetic gamma rays, for which reason it is used in radiation therapy and diagnostics in place of radium or X-rays. It is also used as a diagnostic aid in vitamin B12-related problems. (05 Mar 2000) |
| cobalt isotopes | <radiobiology, physics> Stable cobalt atoms that have the same atomic number as the element cobalt, but differ in atomic weight. Co-59 is a stable cobalt isotope. (12 Dec 1998) |
| cobalt machine | <apparatus> A simple but effective source of irradiation which is employed for external beam radiotherapy. It has limited ability to focus irradiation. (16 Dec 1997) |
| cobalt radioisotopes | Unstable isotopes of cobalt that decay or disintegrate emitting radiation. Co atoms with atomic weights of 54-64, except 59, are radioactive cobalt isotopes. (12 Dec 1998) |
| ackee poisoning | An acute and frequently fatal vomiting disease associated with central nervous system symptoms and marked hypoglycaemia, caused by eating unripe ackee fruit of Blighia spaida, a tree common in Jamaica. Synonym: Jamaican vomiting sickness. (05 Mar 2000) |
| arsenic poisoning | A severe poisoning that occurs after the exposure (ingested or inhaled). Signs and symptoms include: nausea, vomiting, diarrhoea, rapid heart rate, apprehension and difficulty breathing. (27 Sep 1997) |
| bacterial food poisoning | A term commonly used to refer to conditions limited to enteritis or gastroenteritis (excluding the enteric fevers and the dysenteries) caused by bacterial multiplication per se or by a soluble bacterial exotoxin. (05 Mar 2000) |
| blister beetle poisoning | Poisoning, most often of horses, by ingestion of blister beetles (Epicauta spp.) in hay; the causative toxin is cantharidin, which produces salivation, shock, pollakiuria, and colic. (05 Mar 2000) |
| blood poisoning | See: septicaemia, pyaemia. (05 Mar 2000) |
| bracken poisoning | A disease of cattle caused by long-term, low-level consumption of the bracken fern (Pteridium aquilinum) and characterised by haemorrhages or tumours in the bladder. Synonym: bracken poisoning. (05 Mar 2000) |
| cadmium poisoning | Poisoning occurring after exposure to cadmium compounds or fumes. It may cause gastrointestinal syndromes, anaemia, or pneumonitis. (12 Dec 1998) |