| accrescent | <plant biology> Increasing in size with age, as the calyx of some plants after flowering. (15 Jan 1998) |
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| accrete | 1. Characterised by accretion; made up; as, accrete matter. 2. <botany> Grown together. Source: Websters Dictionary (01 Mar 1998) |
| accretio cordis | Adhesion of the pericardium to adjacent extracardiac structures. (05 Mar 2000) |
| accretion | 1. Increase by addition to the periphery of material of the same nature as that already present; e.g., the manner of growth of crystals. Synonym: accrementition. 2. In dentistry, foreign material (usually plaque or calculus) collecting on the surface of a tooth or in a cavity. 3. A growing together. Origin: L. Accretio, fr. Ad, to, + crescere, to grow (05 Mar 2000) |
| accretion lines | Line's seen in microscopic sections of the enamel, marking successive layers of added material. (05 Mar 2000) |
| accretionary growth | Growth by an increase of intercellular material. (05 Mar 2000) |
| 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) |
| 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) |