| 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) |
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| 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) |
| Rocky Mountain spotted fever vaccine | Suspension of inactivated Rickettsia rickettsii prepared by growing the rickettsiae in the embryonate yolk sac of fowl eggs. (05 Mar 2000) |
| rocoa | The orange-coloured pulp covering the seeds of the tropical plant Bixa Orellana, from which annotto is prepared. See Annoto. Origin: Cf. F. Rocou, roicou, Pg. & Braz, uruco. Source: Websters Dictionary (01 Mar 1998) |
| rococo | A florid style of ornamentation which prevailed in Europe in the latter part of the eighteenth century. Origin: F.; of uncertain etymology. Source: Websters Dictionary (01 Mar 1998) |
| rod | 1. A straight and slender stick; a wand; hence, any slender bar, as of wood or metal (applied to various purposes). Specifically: An instrument of punishment or correction; figuratively, chastisement. "He that spareth his rod hateth his son." (Prov. Xiii. 24) A kind of sceptor, or badge of office; hence, figuratively, power; authority; tyranny; oppression. "The rod, and bird of peace." . A support for a fishing line; a fish pole. <machinery> A member used in tension, as for sustaining a suspended weight, or in tension and compression, as for transmitting reciprocating motion, etc.; a connecting bar. An instrument for measuring. 2. A measure of length containing sixteen and a half feet; called also perch, and pole. Black rod. <anatomy> Rods and cones, the elongated cells or elements of the sensory layer of the retina, some of which are cylindrical, others somewhat conical. Origin: The same word as rood. See Rood. Source: Websters Dictionary (01 Mar 1998) |
| rod cell | <ophthalmology, physiology> Major photoreceptor cell of vertebrate retina (about 125 million in a human eye). Columnar cells (about 40m long, 1m diameter) having three distinct regions: a region adjacent to and synapsed with, the neural layer of the retina contains the nucleus and other cytoplasmic organelles, below this is the inner segment, rich in mitochondria, that is connected through a thin neck (in which is located a ciliary body) to the outer segment. The outer segment largely consists of a stack of discs membrane infoldings that are incompletely separated in cones) that are continually replenished near the inner segment and that are shed from the distal end and phagocytosed by the pigmented epithelium. The membranes of the discs are rich in rhodopsin, the pigment that absorbs light. (03 Jul 1999) |
| rod cell of retina | 1. A straight and slender stick; a wand; hence, any slender bar, as of wood or metal (applied to various purposes). Specifically: An instrument of punishment or correction; figuratively, chastisement. "He that spareth his rod hateth his son." (Prov. Xiii. 24) A kind of sceptor, or badge of office; hence, figuratively, power; authority; tyranny; oppression. "The rod, and bird of peace." . A support for a fishing line; a fish pole. <machinery> A member used in tension, as for sustaining a suspended weight, or in tension and compression, as for transmitting reciprocating motion, etc.; a connecting bar. An instrument for measuring. 2. A measure of length containing sixteen and a half feet; called also perch, and pole. Black rod. <anatomy> Rods and cones, the elongated cells or elements of the sensory layer of the retina, some of which are cylindrical, others somewhat conical. Origin: The same word as rood. See Rood. Source: Websters Dictionary (01 Mar 1998) |
| rod disks | Membranous disk's of flattened sacs about 14 nm thick that occur in the outer segment of rods of the retina. (05 Mar 2000) |
| rod fibre | A part of the rod cell of the retina that extends to either side of the cell body; the inner rod fibre terminates in the spherule, a synaptic ending located in the outer plexiform layer. (05 Mar 2000) |
Synonyms : Canal Obturation, Root, Canal Obturations, Root, Obturation, Root Canal, Obturations, Root Canal, Root Canal Obturations
Synonyms : Canal Preparation, Root, Canal Preparations, Root, Preparation, Root Canal, Preparations, Root Canal, Root Canal Preparations
Synonyms : Therapy, Root Canal, Canal Therapies, Root, Canal Therapy, Root, Root Canal Therapies, Therapies, Root Canal
Synonyms : Cary, Cervical, Cervical Cary
Synonyms : Plant Root Nodules
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| rock hyrax |
hyrax that lives in rocky areas
Ãâó: wordnet.princeton.edu/perl/webwn
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| rose water |
perfume consisting of water scented with oil of roses
Ãâó: wordnet.princeton.edu/perl/webwn
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| Rodentia |
small gnawing animals: porcupines; rats; mice; squirrels; marmots; beavers; gophers; voles; hamsters; guinea pigs; agoutis
Ãâó: wordnet.princeton.edu/perl/webwn
|
| roentgenoscope |
fluoroscope: an X-ray machine that combines an X-ray source and a fluorescent screen to enable direct observation
Ãâó: wordnet.princeton.edu/perl/webwn
|
| roseola |
rash: any red eruption of the skin
Ãâó: wordnet.princeton.edu/perl/webwn
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| RO | act or proceed in a riotous, turbulent, or disorderly way |
|---|---|
| RO | leave |
| RO | someone who communicates vocally in a very loud voice |
| RO | a very loud utterance (like the sound of an animal) |
| RO | a deep prolonged loud noise |
| RO | loud enough to cause (temporary) hearing loss |
| RO | very lively and profitable |
| RO | extremely |
| RO | negative criticism |
| RO | a piece of meat roasted or for roasting and of a size for slicing into more than one portion |
| RO | cook with dry heat, usually in an oven |
| RO | (of meat) cooked by dry heat in an oven |
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