| tachypacing | Rapid pacing of the heart by an artificial electronic pacemaker operating faster than the basic cardiac rate. (05 Mar 2000) |
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| tachyphagia | Rarely used term for rapid eating; bolting of food. Origin: tachy-+ G. Phago, to eat (05 Mar 2000) |
| tachyphasia | Synonym: tachylogia. Origin: tachy-+ G. Phasis, speaking (05 Mar 2000) |
| tachyphemia | Synonym: tachylogia. Origin: tachy-+ G. Pheme, speech (05 Mar 2000) |
| tachyphrasia | Synonym: tachylogia. Origin: tachy-+ G. Phrasis, speaking (05 Mar 2000) |
| tachyphylaxis | 1. <immunology> The rapid immunisation against the effect of toxic doses of an extract or serum by previous injection of small doses. 2. <pharmacology> The rapidly decreasing response to a drug or physiologically active agent after administration of a few doses. Origin: Gr. Phylaxis = protection (16 Dec 1997) |
| tachypnea | An abnormally rapid (usually shallow) respiratory rate. The normal resting adult respiratory rate is 12-20 breaths/minute. (27 Sep 1997) |
| tachyrhythmia | Synonym: tachycardia. Origin: tachy-+ G. Rhythmos, rhythm (05 Mar 2000) |
| tachysterol | Sterol(s) formed by ultraviolet irradiation of any 5,7-diene-3b-sterol, which breaks the 9,10 bond, but usually from either or both of ergosterol and lumisterol to produce tachysterol2 (ertacalciol, (6E,22E)-9,10-secoergosta-5(10),6,8,22-tetraen-3b-ol) and from 7-dehydrocholesterol to produce tachysterol3 (tacalciol,(6E,3S)-9,10-secocholesta-5(10),6,8-trien-3b-ol). When reduced to the 5,7-diene (or 5,7,22-triene) form, dihydrotachysterol3 (10,19-dihydrocalciol) or dihydrotachysterol2 (10,19-dihydroercalciol), antirachitic action appears. This property has been of therapeutic interest, but tachysterol is being replaced by the true vitamin D hormone (calcitriol) and its derivatives. (05 Mar 2000) |
| tachysystole | Synonym: tachycardia. Origin: tachy-+ G. Systole, contracting (05 Mar 2000) |
| tachyzoite | A rapidly multiplying stage in the development of the tissue phase of certain coccidial infections, as in Toxoplasma gondii development in acute infections of toxoplasmosis. Origin: tachy-+ G. Zoon, animal (05 Mar 2000) |