| Roger's murmur | A loud pansystolic murmur maximal at the left sternal border, caused by a small ventricular septal defect. Synonym: bruit de Roger, Roger's bruit. (05 Mar 2000) |
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| Roger's reflex | Salivation caused by irritation of the lower end of the oesophagus, as by carcinoma. Synonym: Roger's reflex. (05 Mar 2000) |
| Roger, Georges Henri | <person> French physiologist, 1860-1946. See: Roger's reflex. (05 Mar 2000) |
| Roger, Henri | <person> French physician, 1809-1891. See: Roger's disease, Roger's murmur, bruit de Roger, maladie de Roger. (05 Mar 2000) |
| Roger-Anderson pin fixation appliance | An appliance used in extraoral fixation of mandibular fractures and prognathic corrections in which pins placed in the bone segments are joined by metal connecting rods. See: external pin fixation. (05 Mar 2000) |
| Rogers' sphygmomanometer | An sphygmomanometer with an aneroid barometer gauge. (05 Mar 2000) |
| Rogers, Oscar | <person> U.S. Physician, 1857-1941. See: Rogers' sphygmomanometer. (05 Mar 2000) |
| rogowski loop or coil | <radiobiology> A coiled wire loop which encircles a current-carrying plasma. Changes in total plasma current induce a voltage in the loop, integrating (adding up) the voltage over time gives the plasma current. (09 Oct 1997) |
| rogue | 1. A vagrant; an idle, sturdy beggar; a vagabond; a tramp. The phrase rogues and vagabonds is applied to a large class of wandering, disorderly, or dissolute persons. They were formerly punished by being whipped and having the gristle of the right ear bored with a hot iron. 2. A deliberately dishonest person; a knave; a cheat. "The rogue and fool by fits is fair and wise." (Pope) 3. One who is pleasantly mischievous or frolicsome; hence, often used as a term of endearment. "Ah, you sweet little rogue, you!" (Shak) 4. An elephant that has separated from a herd and roams about alone, in which state it is very savage. 5. <botany> A worthless plant occuring among seedlings of some choice variety. Rogues' gallery, a collection of portraits of rogues or criminals, for the use of the police authorities. Rogue's march, derisive music performed in driving away a person under popular indignation or official sentence, as when a soldier is drummed out of a regiment. Rogue's yarn, yarn of a different twist and colour from the rest, inserted into the cordage of the British navy, to identify it if stolen, or for the purpose of tracing the maker in case of defect. Different makers are required to use yarns of different colours. Origin: F. Rogue proud, haughty, supercilious; cf. Icel. Hrkr a rook, croaker (cf. Rook a bird), or Armor. Rok, rog, proud, arogant. 1. To give the name or designation of rogue to; to decry. 2. <botany> To destroy (plants that do not come up to a required standard). Source: Websters Dictionary (01 Mar 1998) |
| Rohr's stria | Layer of fibrinoid in the intervillous spaces of the placenta. (05 Mar 2000) |
| Rohr, Karl | <person> Swiss embryologist and gynecologist, *1863. See: Rohr's stria. (05 Mar 2000) |
| Rohrer's index | Body weight in grams times 100 divided by the cube of height in centimeters. (05 Mar 2000) |
| ROI | See Return on investment. (05 Dec 1998) |
| roil | 1. To render turbid by stirring up the dregs or sediment of; as, to roil wine, cider, etc, in casks or bottles; to roil a spring. 2. To disturb, as the temper; to ruffle the temper of; to rouse the passion of resentment in; to perplex. "That his friends should believe it, was what roiled him [Judge Jeffreys] exceedingly." (R. North) Provincial in England and colloquial in the United States. A commoner, but less approved, form is rile. Origin: Cf. OE. Roilen to wander; possibly fr. OF. Roeler to roll, equiv. To F. Rouler. See Roll, and cf. Rile. Source: Websters Dictionary (01 Mar 1998) |
| Rokitansky's disease | A lesion in which there is extensive and rapid death of parenchymal cells of the liver, sometimes with fatty degeneration of the size of the organ; the necrosis may result from fulminant viral infection or chemical poisoning; associated with jaundice. Synonym: acute parenchymatous hepatitis, Rokitansky's disease. (05 Mar 2000) |