rickettsiosis, vesicular |
See Rickettsialpox. (12 Dec 1998) |
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rickettsiostatic |
An agent inhibitory to the growth of Rickettsia. Origin: Rickettsia + G. Statikos, bringing to a standstill (05 Mar 2000) |
rickety |
To do with rickets, a disease caused by Vitamin D deficiency. (18 Nov 1997) |
Rickles test |
A colourimetric test for predicting dental caries activity by incubating saliva in sucrose and determining pH changes. (05 Mar 2000) |
Rickles, Norman |
<person> U.S. Oral pathologist, *1920. See: Rickles test. (05 Mar 2000) |
rictal |
<zoology> Of or pertaining to the rictus; as, rictal bristles. Source: Websters Dictionary (01 Mar 1998) |
RID |
<abbreviation> Radial immunodiffusion. (05 Mar 2000) |
Rida virus |
A variant of the scrapie agent. (05 Mar 2000) |
ride |
1. To be carried on the back of an animal, as a horse. "To-morrow, when ye riden by the way." (Chaucer) "Let your master ride on before, and do you gallop after him." (Swift) 2. To be borne in a carriage; as, to ride in a coach, in a car, and the like. See Synonym, below. "The richest inhabitants exhibited their wealth, not by riding in gilden carriages, but by walking the streets with trains of servants." (Macaulay) 3. To be borne or in a fluid; to float; to lie. "Men once walked where ships at anchor ride." (Dryden) 4. To be supported in motion; to rest. "Strong as the exletree On which heaven rides." (Shak) "On whose foolish honesty My practices ride easy!" (Shak) 5. To manage a horse, as an equestrian. "He rode, he fenced, he moved with graceful ease." (Dryden) 6. To support a rider, as a horse; to move under the saddle; as, a horse rides easy or hard, slow or fast. To ride easy, to pitch violently. To ride out. To go upon a military expedition. To ride in the open air. To ride to hounds, to ride behind, and near to, the hounds in hunting. Synonym: Drive. Ride, Drive. Ride originally meant (and is so used throughout the English Bible) to be carried on horseback or in a vehicle of any kind. at present in England, drive is the word applied in most cases to progress in a carriage; as, a drive around the park, etc.; while ride is appropriated to progress on a horse. Johnson seems to sanction this distinction by giving "to travel on horseback" as the leading sense of ride; though he adds "to travel in a vehicle" as a secondary sense. This latter use of the word still occurs to some extent; as, the queen rides to Parliament in her coach of state; to ride in an omnibus. ""Will you ride over or drive?" said Lord Willowby to his quest, after breakfast that morning." (W. Black) Origin: Rode (Rid [rid],); Ridden (Rid,); Riding] [AS. Ridan; akin to LG. Riden, D. Rijden, G. Reiten, OHG. Ritan, Icel. Ritha, Sw. Rida, Dan. Ride; cf. L. Raeda a carriage, which is from a Celtic word. Cf. Road. 1. The act of riding; an excursion on horseback or in a vehicle. 2. A saddle horse. 3. A road or avenue cut in a wood, or through grounds, to be used as a place for riding; a riding. 1. To sit on, so as to be carried; as, to ride a horse; to ride a bicycle. "[They] rend up both rocks and hills, and ride the air In whirlwind." (Milton) 2. To manage insolently at will; to domineer over. "The nobility could no longer endure to be ridden by bakers, cobblers, and brewers." (Swift) 3. To convey, as by riding; to make or do by riding. "Tue only men that safe can ride Mine errands on the Scottish side." (Sir W. Scott) 4. <surgery> To overlap (each other); said of bones or fractured fragments. To ride a hobby, to have some favorite occupation or subject of talk. To ride and tie, to take turn with another in labour and rest; from the expedient adopted by two persons with one horse, one of whom rides the animal a certain distance, and then ties him for the use of the other, who is coming up on foot. To ride down. To ride over; to trample down in riding; to overthrow by riding against; as, to ride down an enemy. To keep safe afloat during (a storm) while riding at anchor or when hove to on the open sea; as, to ride out the gale. Source: Websters Dictionary (01 Mar 1998) |
Rideal, Samuel |
<person> English chemist and bacteriologist, 1863-1929. See: Rideal-Walker coefficient, Rideal-Walker method. (05 Mar 2000) |
Rideal-Walker coefficient |
A figure expressing the disinfecting power of any substance; it is obtained by dividing the figure indicating the degree of dilution of the disinfectant that kills a microorganism in a given time by that indicating the degree of dilution of phenol which kills the organism in the same space of time under similar conditions. Synonym: hygienic laboratory coefficient, phenol coefficient. (05 Mar 2000) |
Rideal-Walker method |
A figure expressing the disinfecting power of any substance; it is obtained by dividing the figure indicating the degree of dilution of the disinfectant that kills a microorganism in a given time by that indicating the degree of dilution of phenol which kills the organism in the same space of time under similar conditions. Synonym: hygienic laboratory coefficient, phenol coefficient. (05 Mar 2000) |
Ridell's operation |
Removal of the entire anterior and inferior walls of the frontal sinus, for chronic inflammation of that cavity. (05 Mar 2000) |
rider |
1. One who, or that which, rides. 2. Formerly, an agent who went out with samples of goods to obtain orders; a commercial traveler. 3. One who breaks or manages a horse. 4. An addition or amendment to a manuscript or other document, which is attached on a separate piece of paper; in legislative practice, an additional clause annexed to a bill while in course of passage; something extra or burdensome that is imposed. "After the third reading, a foolish man stood up to propose a rider." (Macaulay) "This [question] was a rider which Mab found difficult to answer." (A. S. Hardy) 5. <mathematics> A problem of more than usual difficulty added to another on an examination paper. 6. [D. Rijder] A Dutch gold coin having the figure of a man on horseback stamped upon it. "His moldy money ! half a dozen riders." (J. Fletcher) 7. <chemical> Rock material in a vein of ore, dividing it. 8. An interior rib occasionally fixed in a ship's hold, reaching from the keelson to the beame of the lower deck, to strengthen her frame. 9. The second tier of casks in a vessel's hold. 10. A small forked weight which straddles the beam of a balance, along which it can be moved in the manner of the weight on a steelyard. 11. A robber. <medicine> Rider's bone, a bony deposit in the muscles of the upper and inner part of the thigh, due to the pressure and irritation caused by the saddle in riding. Source: Websters Dictionary (01 Mar 1998) |
rider's bone |
Heterotopic bone ossification of the tendon of the adductor longus muscle from strain in horseback riding. Synonym: cavalry bone, exercise bone. (05 Mar 2000) |