| affect displacement | A shift of feeling from the object originally arousing it to some associated object. (05 Mar 2000) |
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| vertical displacement event | Disruption which occurs because plasma is not adequately stabilised against vertical motions. (09 Oct 1997) |
| mesial displacement | Malposition of a tooth mesial to normal, in an anterior direction following the curvature of the dental arch. Synonym: mesial displacement, mesioplacement. (05 Mar 2000) |
| displacement | 1. The act of displacing, or the state of being displaced; a putting out of place. The quantity of anything, as water, displaced by a floating body, as by a ship, the weight of the displaced liquid being equal to that of the displacing body. 2. <psychology> The process by which an emotional or behavioural response that is appropriate for one situation appears in another situation for which it is inappropriate. 3. <chemistry> The process of extracting soluble substances from organic material and the like, whereby a quantity of saturated solvent is displaced, or removed, for another quantity of the solvent. 4. <mechanics> Piston displacement, the volume of the space swept through, or weight of steam, water, etc, displaced, in a given time, by the piston of a steam engine or pump. Origin: Cf. F. Deplacement. Source: Websters Dictionary (03 Jul 1999) |
| displacement analysis | General term for an assay in which a binder competes for labelled versus unlabelled ligand; following separation of free and bound ligand, the ligand (the analyte assayed) is quantitated by relating bound and unbound ratios to known standards. See: enzyme-linked immunosorbent assay, radioreceptor assay, immunoassay, enzyme-multiplied immunoassay technique, radioimmunoassay. Synonym: displacement analysis, saturation analysis. (05 Mar 2000) |
| displacement loop | <molecular biology> A structure that can sometimes be seen on DNA which forms when a small area of the double-stranded molecule comes apart and becomes two single strands. The result is a structure shaped like the letter D. Single-stranded binding proteins are usually present to hold the strands apart for the purpose of DNA replication. (09 Oct 1997) |
| displacement threshold | The least distinguishable break in the contour of a line. (05 Mar 2000) |
| double displacement mechanism | A special multisubstrate reaction in which, for a two-substrate, two-product (i.e., bi-bi) system, an enzyme reacts with one substrate to form a product and a modified enzyme, the latter then reacting with a second substrate to form a second, final product, and regenerating the original enzyme. An example of such a mechanism is found in the aminotransferases. More complex ping-pong mechanisms exist for enzymes having more than two substrates. Synonym: double displacement mechanism. (05 Mar 2000) |
| intervertebral disk displacement | An intervertebral disk in which the nucleus pulposus has protruded through surrounding fibrocartilage. This occurs most frequently in the lower lumbar region. (12 Dec 1998) |
| tissue displacement | The change in the form or position of tissues as a result of pressure. (05 Mar 2000) |
| masticatory silent period | A pause in electromyographic patterns associated with tooth contacts during chewing and biting; a part of the complex feedback mechanism of mandibular control involving receptors in the periodontal ligament and muscles. (05 Mar 2000) |
| silent | Producing no detectable signs or symptoms, said of certain diseases or morbid processes. (05 Mar 2000) |
| silent allele | 1. <genetics> A gene which is inactive. Thus, an amorphic gene. 2. <cell biology> Something that lacks a discernible shape and thus can be describes as amorphous. (05 Feb 1998) |
| silent area | Any area of the cerebrum or cerebellum in which lesions cause no definite sensory or motor symptoms. (05 Mar 2000) |
| silent electrode | In unipolar electrocardiography, a remote electrode placed either upon a single limb or connected with the central terminal and paired with an exploring electrode; the indifferent electrode is supposed to contribute little or nothing to the resulting record. Synonym: dispersing electrode, silent electrode. (05 Mar 2000) |