| REP | <radiobiology, unit> A roentgen equivalent physical is a unit of absorbed radiation approximately equivalent to a roentgen, an international unit of x- or gamma-radiation. An obsolete unit of measurement; that quantity of ionizing radiation of any kind which, upon absorption by living tissue, produces an energy gain per gram of tissue equivalent to that produced by 1 roentgen of X-rays or gamma-rays. Acronym: rep See: rad. (05 Mar 2000) |
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| rep protein | <protein> A protein that triggers a plasmid's replication. An acronym for Repetitive Extragenic Palindromicprotein, this protein is an enzyme produced by a mutant strain of E. Coli that unwinds the DNA helix. (09 Oct 1997) |
| rep-silver | Money anciently paid by servile tenants to their lord, in lieu of the customary service of reaping his corn or grain. See: Reap. Source: Websters Dictionary (01 Mar 1998) |
| repair | 1. To restore to a sound or good state after decay, injury, dilapidation, or partial destruction; to renew; to restore; to mend; as, to repair a house, a road, a shoe, or a ship; to repair a shattered fortune. "Secret refreshings that repair his strength." (Milton) "Do thou, as thou art wont, repair My heart with gladness." (Wordsworth) 2. To make amends for, as for an injury, by an equivalent; to indemnify for; as, to repair a loss or damage. "I 'll repair the misery thou dost bear." (Shak) Synonym: restore, recover, renew, amend, mend, retrieve, recruit. Origin: F. Reparer, L. Reparare; pref. Re- re- + parare to prepare. See Pare, and cf. Reparation. Source: Websters Dictionary (01 Mar 1998) |
| repair enzyme | <enzyme, molecular biology> An enzyme that can catalyze the repair of damaged DNA; e.g., DNA ligase. (05 Mar 2000) |
| repair nuclease | <enzyme, molecular biology> Class of enzymes involved in DNA repair. It includes endonucleases that recognise a site of damage or an incorrect base pairing and cut it out and exonucleases that remove neighbouring nucleotides on one strand. These are then replaced by a DNA polymerase. (18 Nov 1997) |
| repand | <botany> Having a slightly undulating margin; said of leaves. Origin: L. Repandus bent backward, turned up; pref. Re- re- + pandus bent, crooked. Source: Websters Dictionary (01 Mar 1998) |
| reparative dentin | Morphologically irregular dentin formed in response to an irritant. Synonym: irregular dentin, irritation dentin, reparative dentin. (05 Mar 2000) |
| reparative giant cell granuloma | <dermatology, oncology> A non-neoplastic lesion characterised by a proliferation of granulation tissue containing numerous multinucleated giant cells. It occurs on the gingiva and alveolar mucosa (occasionally on other soft tissues) where it presents as a soft red-blue haemorrhagic nodular swelling. It also occurs within the mandible or maxilla as a unilocular or multilocular radiolucency. Peripheral giant cell granuloma refers to the gingiva (giant cell epulis), central refers to the jaw. Microscopically similar lesions occur in the tubular bones of the hands and feet, are considered neoplastic, and may have a malignant course. Identical bony lesions may be seen in hyperparathyroidism and cherubism. See: giant cell tumour of bone. Synonym: giant cell epulis. (05 Mar 2000) |
| repast | To supply food to; to feast; to take food. "Repast them with my blood." "He then, also, as before, left arbitrary the dieting and repasting of our minds." (Milton) Source: Websters Dictionary (01 Mar 1998) |
| RepB helicase | <enzyme> Member of the sf2 superfamily of helicases; homologous to rad25/xpb; isolated from dictyostelium discoideum; do not confuse with repb protein; genbank u77065 Registry number: EC 3.1.- Synonym: DNA helicase repb (26 Jun 1999) |
| RepD helicase | <enzyme> Member of the sf2 superfamily of nucleases; homologous to rad3/xpd; isolated from dictyostelium discoideum; do not confuse with repd protein; genbank u77066 Registry number: EC 3.1.- Synonym: DNA helicase repd (26 Jun 1999) |
| repeal | 1. To recall; to summon again, as persons. "The banished Bolingbroke repeals himself, And with uplifted arms is safe arrived." (Shak) 2. To recall, as a deed, will, law, or statute; to revoke; to rescind or abrogate by authority, as by act of the legislature; as, to repeal a law. 3. To suppress; to repel. "Whence Adam soon repealed The doubts that in his heart arose." (Milton) Synonym: To abolish, revoke, rescind, recall, annul, abrogate, cancel, reverse. See Abolish. Origin: OF. Repeler to call back, F. Rappeler; pref. Re- re- + OF. Apeler, F. Appeler, to call, L. Appellare. See Appeal, and. Cf. Repel. Source: Websters Dictionary (01 Mar 1998) |
| repeater | One who, or that which, repeats. Specifically: A watch with a striking apparatus which, upon pressure of a spring, will indicate the time, usually in hours and quarters. A repeating firearm. <medicine> A pennant used to indicate that a certain flag in a hoist of signal is duplicated. Source: Websters Dictionary (01 Mar 1998) |
| repeating | Doing the same thing over again; accomplishing a given result many times in succession; as, a repeating firearm; a repeating watch. Repeating circle. See the Note under Circle. <mathematics> Repeating decimal, instruments for observing angles, as a circle, theodolite, etc, so constructed that the angle may be measured several times in succession, and different, but successive and contiguous, portions of the graduated limb, before reading off the aggregate result, which aggregate, divided by the number of measurements, gives the angle, freed in a measure from errors of eccentricity and graduation. Repeating watch. See Repeater Source: Websters Dictionary (01 Mar 1998) |