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biological rhythm
biological rhythm cyclic pattern of physiological changes or changes in activity in living organisms, most often synchronized with daily, monthly, or annual cyclical changes in the environment. The exact nature of the internal mechanism, or "biological clock," that controls such rhythms is not ...
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biorhythm
biorhythm or biological rhythm, cyclic pattern of changes in physiology or in activity of living organisms, often synchronized with daily, monthly, or yearly environmental changes. Rhythms that vary according to the time of day (circadian rhythms), in part a response to daylight or dark, includ...
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rhythm
rhythm the basic temporal element of music, concerned with duration and with stresses or accents whether irregular or organized into regular patternings. The formulation in the late 12th cent. of the rhythmic modes—basic recurrent patterns that were adhered to in composition—began the d...
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Franz Berwald
Franz Berwald , 1796-1868, Swedish composer. His music, which is highly original in its use of rhythm, harmony, and orchestration, had little popular success. Best known for his four surviving symphonies, he also wrote several concertos, chamber works, and operas.
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bolero
bolero , national dance of Spain, introduced c.1780 by Sebastian Zerezo, or Cerezo. Of Moroccan origin, it resembles the fandango . It is in 2-4 or 3-4 time for solo or duo dancing and is performed to the accompaniment of castanets, guitar, and the voices of the dancers. Ravel's Bolero is in this...
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Clarksdale
Clarksdale city (1990 pop. 19,717), seat of Coahoma co., NW Miss., on the Sunflower River; inc. 1882. It is a processing and distribution center for agriculture, its main resource. There is also light manufacturing. Clarksdale also is a major center for rhythm-and-blues music.
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defibrillator
defibrillator device that delivers an electrical shock to the heart in order to stop certain forms of rapid heart rhythm disturbances ( arrhythmias ). The shock changes a fibrillation to an organized rhythm or changes a very rapid and ineffective cardiac rhythm to a slower, more effective one. In a...
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homophony
homophony , species of musical ensemble texture in which all voice parts move more or less to the same rhythm, in which a listener tends to hear the highest voice as the melody and the lower voices as its accompaniment. This term is also used for a texture comprising a melodic line with chordal acco...
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quinidine
quinidine , heart muscle relaxant used to maintain regular heart rhythm patterns. It is an alkaloid chemically similar to quinine and, like quinine, occurs naturally in some species of cinchona trees. Quinidine slows the rate of blood flow in heart chambers and lowers the excitability of the mus...
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arrhythmia
arrhythmia , disturbance in the rate or rhythm of the heartbeat. Various arrhythmias can be symptoms of serious heart disorders; however, they are usually of no medical significance except in the presence of additional symptoms. The heart's rhythm is controlled by an electrical impulse that is gen...
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