| toxic psychosis | A psychosis caused by some toxic substance, whether endogenous or exogenous. (05 Mar 2000) |
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| toxic retinopathy | Retinal changes due to prolonged administration of various drugs. (05 Mar 2000) |
| toxic shock | See toxic shock syndrome. (12 Dec 1998) |
| toxic shock syndrome | <syndrome> A blood-borne bacterial infection caused by the genus Staphylococcus. Usually effects menstruating females under the age of thirty and was associated in the past with the use of a particular type of tampon (no longer used). Common symptoms include: fever, chills, vomiting, sore throat, headache and decreased urine output. Progression of disease can result in lowering of blood pressure (shock) and renal failure. Treatment includes hospitalisation and intravenous antibiotics emergently. (27 Sep 1997) |
| toxic substances | A chemical or mixture of chemicals that presents a high risk of injury to human health or to the environment. (05 Dec 1998) |
| toxic tetanus | Tonic spasms caused by strychnine or other tetanic. Synonym: toxic tetanus. (05 Mar 2000) |
| toxic unit | A unit formerly synonymous with minimal lethal dose but which, because of the instability of toxins, is now measured in terms of the quantity of standard antitoxin with which the toxin combines. See: L doses, minimal lethal dose. Synonym: toxin unit. (05 Mar 2000) |
| toxicaemia | 1. <microbiology> The condition resulting from the spread of bacterial products (toxins) by the bloodstream. 2. <biochemistry> A condition resulting from metabolic disturbances, for example toxaemia of pregnancy. Origin: Gr. Haima = blood (18 Nov 1997) |
| toxical | Of or pertaining to poison; poisonous; as, toxic medicines. Origin: L. Toxicum poison, originally, a poison in which arrows were dipped, Gr. (sc) poison for smearing arrows with, fr. Of or for the bow, from bow, arrow. Cf. Intoxicate. Source: Websters Dictionary (01 Mar 1998) |
| toxicant | Synonym: poisonous. 2. Any poisonous agent, specifically an alcoholic or other poison, causing symptoms of what is popularly called intoxication. (05 Mar 2000) |
| toxicity | The quality of being poisonous, especially the degree of virulence of a toxic microbe or of a poison. (18 Nov 1997) |
| toxicity test | <investigation> Controlled laboratory test to determine the toxicity of a chemical to an organism in terms of specific chemical concentrations. An acute toxicity test establishes the concentration required to kill a predetermined proportion of test organisms within a relatively short period of time, typically 4 days or less. A chronic toxicity test reveals the effects of a sublethal concentration applied throughout all or part of the life cycle. (12 Jan 1998) |
| toxicity tests | Tests that determine the toxicity of a substance. These include tests of clinical drugs, foods, environmental pollutants, etc. (12 Dec 1998) |
| toxico- | Poison, toxin. Origin: G. Toxikon, bow, hence (arrow) poison (05 Mar 2000) |
| toxicodendron | A genus (formerly rhus) of shrubs, vines, or trees that yields a highly allergenic oleoresin which causes a severe contact dermatitis. The most toxic species are toxicodendron vernix (poison sumac), t. Diversilobum (poison oak), and t. Radicans (poison ivy). T. Vernicifera yields a useful varnish from which certain enzymes (laccases) are obtained. (12 Dec 1998) |