| rock shaft | <machinery> A shaft that oscillates on its journals, instead of revolving, usually carrying levers by means of which it receives and communicates reciprocating motion, as in the valve gear of some steam engines. Synonym: rocker, rocking shaft, and way shaft. Origin: Cf. Rock, v. I. Source: Websters Dictionary (01 Mar 1998) |
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| rock staff | An oscillating bar in a machine, as the lever of the bellows of a forge. Origin: Cf. Rock. Source: Websters Dictionary (01 Mar 1998) |
| rocker | 1. One who rocks; specifically, one who rocks a cradle. "It was I, sir, said the rocker, who had the honor, some thirty years since, to attend on your highness in your infancy." (Fuller) 2. One of the curving pieces of wood or metal on which a cradle, chair, etc, rocks. 3. Any implement or machine working with a rocking motion, as a trough mounted on rockers for separating gold dust from gravel, etc, by agitation in water. 4. A play horse on rockers; a rocking-horse. 5. A chair mounted on rockers; a rocking-chair. 6. A skate with a curved blade, somewhat resembling in shape the rocker of a cradle. 7. <machinery> Same as Rock shaft. <machinery> Rocker arm, an arm borne by a rock shaft. Source: Websters Dictionary (01 Mar 1998) |
| rockery | <botany> A mound formed of fragments of rock, earth, etc, and set with plants. Source: Websters Dictionary (01 Mar 1998) |
| rocket | 1. An artificial firework consisting of a cylindrical case of paper or metal filled with a composition of combustible ingredients, as niter, charcoal, and sulphur, and fastened to a guiding stick. The rocket is projected through the air by the force arising from the expansion of the gases liberated by combustion of the composition. Rockets are used as projectiles for various purposes, for signals, and also for pyrotechnic display. 2. A blunt lance head used in the joust. Congreve rocket, a powerful form of rocket for use in war, invented by Sir William Congreve. It may be used either in the field or for bombardment; in the former case, it is armed with shells or case shot; in the latter, with a combustible material inclosed in a metallic case, which is inextinguishable when kindled, and scatters its fire on every side. Origin: It. Rocchetta, fr. Rocca a distaff, of German origin. Named from the resemblance in shape to a distaff. See Rock a distaff. <botany> A cruciferous plant (Eruca sativa) sometimes eaten in Europe as a salad. <botany> A common cruciferous weed with yellow flowers (Barbarea vulgaris). Origin: F. Roquette (cf. Sp. Ruqueta, It ruchetta), fr. L. Eruca. Source: Websters Dictionary (01 Mar 1998) |
| rocket immunoelectrophoresis | A quantitative method for serum proteins which involves electrophoresis of antigen into a gel containing antibody; the technique is restricted to detection of antigens that move to the positive pole on electrophoresis. See: electroimmunodiffusion. Two-dimensional immunoelectrophoresis, a combination of conventional electrophoretic separation and electroimmunodiffusion; electrophoresis is first carried out, then the electrophoretic strip is placed on a second slide and an antibody-containing agarose solution is allowed to solidify adjacent to it; electrophoresis is then performed at right angles to the original separation. Synonym: crossed immunoelectrophoresis. (05 Mar 2000) |
| rockfish | <zoology> Any one of several California scorpaenoid food fishes of the genus Sebastichthys, as the red rockfish (S. Ruber). They are among the most important of California market fishes. Called also rock cod, and garrupa. The striped bass. See Bass. Any one of several species of Florida and Bermuda groupers of the genus Epinephelus. An American fresh water darter; the log perch. The term is locally applied to various other fishes. Source: Websters Dictionary (01 Mar 1998) |
| rockling | <zoology> Any species of small marine fishes of the genera Onos and Rhinonemus (formerly Motella), allied to the cod. They have three or four barbels. Source: Websters Dictionary (01 Mar 1998) |
| rockrose | <botany> A name given to any species of the genus Helianthemum, low shrubs or herbs with yellow flowers, especially the European H. Vulgare and the American frostweed, H. Canadense. Cretan rockrose, a related shrub (Cistus Creticus), one of the plants yielding the fragrant gum called ladanum. Source: Websters Dictionary (01 Mar 1998) |
| rocksucker | <zoology> A lamprey. Source: Websters Dictionary (01 Mar 1998) |
| rockweed | <botany> Any coarse seaweed growing on sea-washed rocks, especially Fucus. Source: Websters Dictionary (01 Mar 1998) |
| rockwood | <chemical> Ligniform asbestus; also, fossil wood. Source: Websters Dictionary (01 Mar 1998) |
| rockwork | 1. Stonework in which the surface is left broken and rough. 2. <botany> A rockery. Source: Websters Dictionary (01 Mar 1998) |
| rocky | 1. Full of, or abounding in, rocks; consisting of rocks; as, a rocky mountain; a rocky shore. 2. Like a rock; as, the rocky orb of a shield. 3. Not easily impressed or affected; hard; unfeeling; obdurate; as, a rocky bosom. <zoology> Rocky Mountain locust See Bighorn. Source: Websters Dictionary (01 Mar 1998) |
| rocky mountain spotted fever | <infectious disease> An acute febrile (feverish) disease initially recognised in the Rocky Mountain states, caused by Rickettsia rickettsii transmitted by hard-shelled (ixodid) ticks. Occurs only in the Western Hemisphere. The disease is characterised by sudden onset of headache, chills and fever which can persist for 2-3 weeks, muscle pain. A characteristic rash appears on the extremities and trunk about the 4th day of illness. The rickettsiae grow within damaged cells lining blood vessels which may become blocked by clots. Blood vessel inflammation (vasculitis) is widespread Early recognition of the condition and prompt antibiotic treatment is important in reducing mortality. Synonym: spotted fever, tick fever, and tick typhus. (25 Jun 1999) |
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| Rocephin |
ceftriaxone: a parenteral cephalosporin (trade name Rocephin) used for severe infection of the lungs or throat or ears or urinary tract
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| Rock |
a lump or mass of hard consolidated mineral matter; "he threw a rock at me" material consisting of the aggregate of minerals like those making up the Earth's crust; "that mountain is solid rock"; "stone is abundant in New England and there are many quarries" United States gynecologist and devout Catholic who conducted the first clinical trials of the oral contraceptive pill (1890-1984) (figurative) someone who is strong and stable and dependable; "he was her rock during the crisis"; "Thou art Peter, and upon this rock I will build my church"--Gospel According to Matthew rock candy: hard bright-colored stick candy (typically flavored with peppermint) move back and forth or sideways; "the ship was rocking"; "the tall building swayed"; "She rocked back and forth on her feet" rock 'n' roll: a genre of popular music originating in the 1950s; a blend of Black rhythm-and-blues with White country-and-western; "rock is a generic term for the range of styles that evolved out of rock'n'roll." pitching dangerously to one side cause to move back and forth; "rock the cradle"; "rock the baby"; "the wind swayed the trees gently"
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brucellosis: infectious bacterial disease of human beings transmitted by contact with infected animals or infected meat or milk products; characterized by fever and headache
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| ROC | a double salt used in Seidlitz powder |
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| ROC | a town in southeast Minnesota |
| ROC | a city in western New York |
| ROC | optical device that produces plane-polarized ultraviolet light |
| ROC | pitching dangerously to one side |
| ROC | a genre of popular music originating in the 1950s |
| ROC | hard stick bright-colored stick candy typically peppermint flavored |
| ROC | a lump or mass of hard consolidated mineral matter |
| ROC | material consisting of the aggregate of minerals like those making up the Earth's crust |
| ROC | move back and forth in an unstable manner |
| ROC | cause to move back and forth |
| ROC | rock or place in or as if in a cradle |
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