| repellant guiding molecule | <cell biology> Specific molecules that inhibit the activity of growth cones and are thought to be important in establishing axon pathways during nervous system development. See: growth cone collapse. (18 Nov 1997) |
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| repellent | 1. That which repels. 2. <medicine> A remedy to repel from a tumefied part the fluids which render it tumid. 3. A kind of waterproof cloth. Source: Websters Dictionary (01 Mar 1998) |
| repent | <plant biology> Said of a stem that is prostrate and rooting at the nodes. (09 Oct 1997) |
| repercussion | 1. The act of driving back, or the state of being driven back; reflection; reverberation; as, the repercussion of sound. "Ever echoing back in endless repercussion." (Hare) 2. Rapid reiteration of the same sound. 3. <medicine> The subsidence of a tumour or eruption by the action of a repellent. 4. <obstetrics> In a vaginal examination, the act of imparting through the uterine wall with the finger a shock to the foetus, so that it bounds upward, and falls back again against the examining finger. Origin: L. Repercussio: cf. F. Repercussion. Source: Websters Dictionary (01 Mar 1998) |
| repercussive | 1. Tending or able to repercuss; having the power of sending back; causing to reverberate. "Ye repercussive rocks! repeat the sound." (W. Pattison) 2. Repellent. "Blood is stanched by astringent and repecussive medicines." 3. Driven back; rebounding; reverberated. "Rages loud the repercussive roar." Origin: Cf. F. Repercussif. Source: Websters Dictionary (01 Mar 1998) |
| reperfusion | The restoration of blood flow to an organ or tissue. After a heart attack, an immediate goal is to quickly open blocked arteries and reperfuse the heart muscles. Early reperfusion minimises the extent of heart muscle damage and preserves the pumping function of the heart. (12 Dec 1998) |
| reperfusion injury | Functional, metabolic, or structural changes, including necrosis, in ischemic tissues thought to result from reperfusion to ischemic areas of the tissue. The most common instance is myocardial reperfusion injury. (12 Dec 1998) |
| repetend | <mathematics> That part of a circulating decimal which recurs continually, ad infinitum: sometimes indicated by a dot over the first and last igures; thus, in the circulating decimal .728328328 + (otherwise .7283), the repetend is 283. Origin: L. Repetendus to be repeated, fr. Repetere to repeat. Source: Websters Dictionary (01 Mar 1998) |
| repetition | 1. The act of repeating; a doing or saying again; iteration. "I need not be barren of accusations; he hath faults, with surplus to tire in repetition." (Shak) 2. Recital from memory; rehearsal. 3. The act of repeating, singing, playing, the same piece or part a second time; reiteration of a note. 4. Reiteration, or repeating the same word, or the same sense in different words, for the purpose of making a deeper impression on the audience. 5. <astronomy> The measurement of an angle by successive observations with a repeating instrument. Synonym: Iteration, rehearsal. See Tautology. Origin: L. Repetitio: cf. F. Repetition. See Repeat. Source: Websters Dictionary (01 Mar 1998) |
| repetition rate | The number of pulses per minute, describing an energy outpute.g., ultrasound pulses in echocardiography rather than vascular pulses. (05 Mar 2000) |
| repetition time | In magnetic resonance imaging, the time between repetitions of the pulse sequence. (05 Mar 2000) |
| repetition-compulsion | In psychoanalysis, the tendency to repeat earlier experiences or actions, in an unconscious effort to achieve belated mastery over them; a morbid need to repeat a particular behaviour such as handwashing or repeated checking to see if the door is locked. (05 Mar 2000) |
| repetition-compulsion principle | In psychoanalysis, the impulse to redramatise or reenact earlier emotional experiences or situations. Synonym: principle of inertia. (05 Mar 2000) |
| repetition/replication | There are four plots in a repetition/replication, the early, mid and late seral treatment plots and a control plot. A repetition/replication is also called a "block." There should be at least three repetitions/ replications in a research study to obtain statistical reliability. (05 Dec 1998) |
| repetitive | Containing repetition, repetitions. (18 Nov 1997) |