| temperature-compensated vaporiser | A vaporiser of liquid anaesthetics with graduated settings calibrated to deliver a known constant concentration of a specific anaesthetic despite changes in inflow volume and despite cooling brought about by vaporization. (05 Mar 2000) |
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| temperature-sensitive mutant | A viral mutant that is able to replicate at one portion of a temperature range but not at another, the parent (wild type) strain being able to replicate over the whole temperature range. Compare: cold-sensitive mutant, quick-stop mutant. (05 Mar 2000) |
| tempering | <chemistry> The process of giving the requisite degree of hardness or softness to a substance, as iron and steel; especially, the process of giving to steel the degree of hardness required for various purposes, consisting usually in first plunging the article, when heated to redness, in cold water or other liquid, to give an excess of hardness, and then reheating it gradually until the hardness is reduced or drawn down to the degree required, as indicated by the colour produced on a polished portion, or by the burning of oil. Tempering colour, the shade of colour that indicates the degree of temper in tempering steel, as pale straw yellow for lancets, razors, and tools for metal; dark straw yellow for penknives, screw taps, etc.; brown yellow for axes, chisels, and plane irons; yellow tinged with purple for table knives and shears; purple for swords and watch springs; blue for springs and saws; and very pale blue tinged with green, too soft for steel instruments. Source: Websters Dictionary (01 Mar 1998) |
| tempero-mandibular joint | The TMJ hinges the lower jaw (mandible) to the skull. (12 Dec 1998) |
| tempero-mandibular joint syndrome | <syndrome> Disorder of the temporo-mandibular joint(s) causing pain usually in front of the ear(s). Pain in the tmj can be due to trauma (such as a blow to the face), inflammatory or degenerative arthritis, or by the mandible being pushed back towards the ears whenever the patient chews or swallows. Sometimes, muscles around the tmj used for chewing can go into spasm, causing head and neck pain and difficulty opening the mouth normally. (12 Dec 1998) |