| thermojunction | A device for measuring slight changes in temperature, consisting of two wires of different metals, one wire being kept at a certain low temperature, the other in the tissue or other material whose temperature is to be measured; a thermoelectric current is set up which is measured by a potentiometer. Synonym: thermojunction. (05 Mar 2000) |
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| thermokeratoplasty | A procedure in which the application of heat shrinks the collagen of the corneal stroma and flattens the cornea in the area of heat application. This tends to make the eye less myopic. See: refractive keratoplasty. Origin: thermo-+ G. Keras, horn, + plasso, to form (05 Mar 2000) |
| thermolabile | Subject to alteration or destruction by heat. Origin: thermo-+ L. Labilis, perishable (05 Mar 2000) |
| thermolabile opsonin | That normally present in the blood, i.e., without stimulation by a known, specific antigen such as certain complement components; it is relatively thermolabile and reacts with various organisms. Synonym: common opsonin, thermolabile opsonin. Specific opsonin, antibodies formed in response to stimulation by a specific antigen, either as a result of an attack of a disease, or injections with a suitably prepared suspension of the specific microorganism. Synonym: immune opsonin, thermostable opsonin. (05 Mar 2000) |
| thermolamp | A lamp that emits infrared light and produces heat; used to apply topical heat to the skin. Synonym: thermolamp. (05 Mar 2000) |
| thermology | <study> A discourse on, or an account of, heat. Origin: Thermo-. Source: Websters Dictionary (01 Mar 1998) |
| thermoluminescence dosimetry | The calculation of a radiation dose by measuring the light output after heating a special absorbent material (e.g., lithium fluoride) placed in the radiation beam; the light output is proportional to the amount of radiation exposure. (05 Mar 2000) |
| thermolysin | <protein> Heat stable metalloproteinase (EC 3.4.24.4.) produced by a strain of Bacillus stearothermophilus. Retains 50% of its activity after 1h at 80쵣. (18 Nov 1997) |
| thermolysis | <chemistry> The resolution of a compound into parts by heat; dissociation by heat. Origin: Thermo- + Gr. To loose. Source: Websters Dictionary (01 Mar 1998) |
| thermolytic | 1. Relating to thermolysis. 2. An agent promoting heat dissipation. (05 Mar 2000) |
| thermolyze | <chemistry> To subject to thermolysis; to dissociate by heat. Source: Websters Dictionary (01 Mar 1998) |
| thermomagnetism | Magnetism as affected or caused by the action of heat; the relation of heat to magnetism. Origin: Thermo- + magnetism. Source: Websters Dictionary (01 Mar 1998) |
| thermomassage | Combination of heat and massage in physical therapy. (05 Mar 2000) |
| thermometer | <physics> An instrument for measuring temperature, founded on the principle that changes of temperature in bodies are accompained by proportional changes in their volumes or dimensions. The thermometer usually consists of a glass tube of capillary bore, terminating in a bulb, and containing mercury or alcohol, which expanding or contracting according to the temperature to which it is exposed, indicates the degree of heat or cold by the amount of space occupied, as shown by the position of the top of the liquid column on a graduated scale. See Centigrade, Fahrenheit, and Reaumur. To reduce degrees Fahrenheit to degrees Centigrade, substract 32 deg and multiply by 5/9; to reduce degrees Centigrade to degrees Fahrenheit, multiply by 9/5 and add 32 deg . Air thermometer, Balance thermometer, etc. See Air, Balance, etc. Metallic thermometer, a form of thermometer indicating changes of temperature by the expansion or contraction of rods or strips of metal. Register thermometer, or Self-registering thermometer, a thermometer that registers the maximum and minimum of temperature occurring in the interval of time between two consecutive settings of the instrument. A common form contains a bit of steel wire to be pushed before the column and left at the point of maximum temperature, or a slide of enamel, which is drawn back by the liquid, and left within it at the point of minimum temperature. Origin: Thermal. Source: Websters Dictionary (01 Mar 1998) |
| thermometers | Instruments for determining temperatures. (12 Dec 1998) |
| thermistor |
A device with electrical resistance that varies markedly and monotonically and that possesses a negative temperature coefficient of resistivity. The thermistors commonly used in meteorology are composed of solid semiconducting materials with resistance that decreases 4% per
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| thermogram |
The record of a thermograph.
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| thermoscope |
An instrument that measures temperature changes, in contrast with a thermometer, which measures the absolute temperature. Middleton, WEK, 1969: Invention of the Meteorological Instruments, Johns Hopkins Press, Baltimore, p. 44.
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| thermodynamics |
A collection of ideas and axioms, leading to differential equations specifying rates of change, that describes our experience with processes that involve fluxes of heat and changes in energy content. Thermodynamics introduces a new concept
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| thermograph |
A self-recording thermometer. The thermometric element is most commonly either a bimetal strip or a Bourdon tube filled with a liquid. In the first case the bimetal element has the form of a helical coil with one end rigidly fastened to the instrument and the other to the recording pen. ...
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| THE | to believe especially on uncertain or tentative grounds |
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| THE | someone who theorizes (especially in science or art) |
| THE | a tentative theory about the natural world |
| THE | a belief that can guide behavior |
| THE | a well-substantiated explanation of some aspect of the natural world |
| THE | (chemistry) theory that describes aqueous solutions in terms of acids (which dissociate to give hydrogen ions) and bases (which dissociate to give hydroxyl ions) |
| THE | (chemistry) theory that describes aqueous solutions in terms of acids (which dissociate to give hydrogen ions) and bases (which dissociate to give hydroxyl ions) |
| THE | (biology) a scientific theory of the origin of species of plants and animals |
| THE | a theory of competition stated in terms of gains and losses among opposing players |
| THE | (physics) the theory that any two particles of matter attract one another with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between them |
| THE | (physics) the theory that any two particles of matter attract one another with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between them |
| THE | (chemistry) the theory that all indicators are either weak acids or weak bases in which the color of the ionized form is different from the color before dissociation |