| chronotaraxis | Distortion or confusion of the sense of time. Origin: chrono-+ G. Taraxis, confusion (05 Mar 2000) |
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| chronotherapy | The adaptation of the administration of drugs to circadian rhythms. The concept is based on the response of biological functions to time-related events, such as the low point in epinephrine levels between 10 p.m. And 4 a.m. Or the elevated histamine levels between midnight and 4 a.m. The treatment is aimed at supporting normal rhythms or modifying therapy based on known variations in body rhythms. While chronotherapy is commonly used in cancer chemotherapy, it is not restricted to cancer therapy or to chemotherapy. (12 Dec 1998) |
| chronotropic | <pharmacology> Affecting the time or rate, as the rate of contraction of the heart. Origin: Gr. Tropikos = turning (18 Nov 1997) |
| chronotropism | Modification of the rate of a periodic movement, e.g., the heartbeat, through some external influence. Origin: chrono-+ G. Trope, turn, change Negative chronotropism, retardation of movement, especially of the heart rate. Positive chronotropism, acceleration of movement, especially of the heart rate. (05 Mar 2000) |