| accrochage | Intermittent synchronization of two different rhythms of the heart with one influencing the behaviour of the other when neither is dominant; seen in cases of atrioventricular dissociation when an atrial beat falls shortly after a ventricular beat, the latter causing the atrial beat to occur sooner than expected. Origin: Fr. Hooking, hitching (05 Mar 2000) |
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| acculturation | Process of cultural change in which one group or members of a group assimilates various cultural patterns from another. (12 Dec 1998) |
| accumbent | <botany> The orientation of an embryo, with the radicle lying against the edges of the two cotyledons. (15 Jan 1998) |
| accumulating shear | A feller-buncher shearhead that is capable of accumulating and holding 2 or more cut stems. (05 Dec 1998) |
| accumulation | The action or process of accumulating, state of being or having accumulated, a collecting together. <pharmacology> Repeated exposures to a chemical or drug may result in the progressive increase of its concentration in an organism, organ or tissue. Illness or other effects may increase with successive doses. Factors involved in accumulation include selective binding of the drug to tissue molecules, concentration of fat soluble drugs in body fat, absent or slow metabolism of the drug, and slow excretion of the drug. Accumulation is a mass balance effect where input exceeds output. (15 Jan 1998) |
| accumulation analysis | A technique in which an intermediate of a metabolic pathway accumulates due to selective inhibition of a particular step in that pathway or in a mutant that is deficient in a certain step. The intermediate is then isolated, analyzed, and identified. (05 Mar 2000) |
| accumulation disease | A disease characterised by abnormal accumulation of a metabolic product in certain cells and tissues; examples include the mucopolysaccharidoses, lipoidoses. (05 Mar 2000) |
| accumulator | 1. One who, or that which, accumulates, collects, or amasses. 2. <mechanics> An apparatus by means of which energy or power can be stored, such as the cylinder or tank for storing water for hydraulic elevators, the secondary or storage battery used for accumulating the energy of electrical charges, etc. 3. A system of elastic springs for relieving the strain upon a rope, as in deep-sea dredging. Origin: L. Source: Websters Dictionary (01 Mar 1998) |
| accuracy | The degree to which a measurement, or an estimate based on measurements, represents the true value of the attribute that is being measured. In the laboratory accuracy of a test is determined when possible by comparing results from the test in question with results generated from an established reference method. (05 Mar 2000) |
| accustomable | Habitual; customary; wonted. "Accustomable goodness." Source: Websters Dictionary (01 Mar 1998) |
| accustomably | According to custom; ordinarily; customarily. Source: Websters Dictionary (01 Mar 1998) |
| accustomance | Custom; habitual use. Origin: OF. Accoustumance, F. Accoutumance. Source: Websters Dictionary (01 Mar 1998) |
| accustomarily | Customarily. Source: Websters Dictionary (01 Mar 1998) |
| accustomary | Usual; customary. Source: Websters Dictionary (01 Mar 1998) |
| accustomed | 1. Familiar through use; usual; customary. "An accustomed action." 2. Frequented by customers. "A well accustomed shop." Source: Websters Dictionary (01 Mar 1998) |