| RUD | recurrent ulcer of the duodenal bulb |
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| rud | 1. Redness; blush. 2. Ruddle; red ocher. 3. <zoology> The rudd. Origin: AS. Rudu, akin to read red. See Red, and cf. Ruddy. Source: Websters Dictionary (01 Mar 1998) |
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| Rud's syndrome | <syndrome> Ichthyosiform erythroderma associated with acanthosis nigricans, dwarfism, hypogonadism, and epilepsy; mostly sporadic, but may be an X-linked recessive trait. (05 Mar 2000) |
| rudd | <zoology> A fresh water European fish of the Carp family (Leuciscus erythrophthalmus). It is about the size and shape of the roach, but it has the dorsal fin farther back, a stouter body, and red irises. Called also redeye, roud, finscale, and shallow. A blue variety is called azurine, or blue roach. See: Rud. Source: Websters Dictionary (01 Mar 1998) |
| rudder | Origin: OE. Rother, AS. Rother a paddle; akin to D. Roer rudder, oar, G. Ruder, OHG. Roadar, Sw. Roder, ror, Dan. Roer, ror. See Row to propel with an oar, and cf. Rother. 1. The mechanical appliance by means of which a vessel is guided or steered when in motion. It is a broad and flat blade made of wood or iron, with a long shank, and is fastened in an upright position, usually by one edge, to the sternpost of the vessel in such a way that it can be turned from side to side in the water by means of a tiller, wheel, or other attachment. 2. That which resembles a rudder as a guide or governor; that which guides or governs the course. "For rhyme the rudder is of verses." (Hudibras) Balance rudder, ropes connected with the rudder chains. Source: Websters Dictionary (01 Mar 1998) |
| ruddle | <chemical> A species of red earth coloured by iron sesquioxide; red ocher. See: Rud; cf. Reddle. Source: Websters Dictionary (01 Mar 1998) |
| ruddock | 1. <zoology> The European robin. "The tame ruddock and the coward kite." 2. A piece of gold money; probably because the gold of coins was often reddened by copper alloy. Called also red ruddock, and golden ruddock. "Great pieces of gold . . . Red ruddocks." (Florio) Origin: AS. Ruddic; cf. W. Rhuddog the redbreast. See Rud Alternative forms: raddock. Source: Websters Dictionary (01 Mar 1998) |
| ruddy | 1. Of a red colour; red, or reddish; as, a ruddy sky; a ruddy flame. "They were more ruddy in body than rubies." (Lam. Iv. 7) 2. Of a lively flesh colour, or the colour of the human skin in high health; as, ruddy cheeks or lips. Ruddy duck the sanderling. Origin: AS. Rudig. See Rud. Source: Websters Dictionary (01 Mar 1998) |
| rude | 1. Characterised by roughness; umpolished; raw; lacking delicacy or refinement; coarse. "Such gardening tools as art, yet rude, . . . Had formed." (Milton) 2. Hence, specifically: Unformed by taste or skill; not nicely finished; not smoothed or polished; said especially of material things; as, rude workmanship. "Rude was the cloth." "Rude and unpolished stones." (Bp. Stillingfleet) "The heaven-born child All meanly wrapt in the rude manger lies." (Milton) Of untaught manners; unpolished; of low rank; uncivil; clownish; ignorant; raw; unskillful; said of persons, or of conduct, skill, and the like. "Mine ancestors were rude." "He was but rude in the profession of arms." (Sir H. Wotton) "the rude forefathers of the hamlet sleep." (Gray) Violent; tumultuous; boisterous; inclement; harsh; severe; said of the weather, of storms, and the like; as, the rude winter. "[Clouds] pushed with winds, rude in their shock." (Milton) "The rude agitation [of water] breaks it into foam." (Boyle) Barbarous; fierce; bloody; impetuous; said of war, conflict, and the like; as, the rude shock of armies. Not finished or complete; inelegant; lacking chasteness or elegance; not in good taste; unsatisfactory in mode of treatment; said of literature, language, style, and the like. "The rude Irish books." "Rude am I in my speech." (Shak) "Unblemished by my rude translation." (Dryden) Synonym: Impertinent, rough, uneven, shapeless, unfashioned, rugged, artless, unpolished, uncouth, inelegant, rustic, coarse, vulgar, clownish, raw, unskillful, untaught, illiterate, ignorant, uncivil, impolite, saucy, impudent, insolent, surly, currish, churlish, brutal, uncivilized, barbarous, savage, violent, fierce, tumultuous, turbulent, impetuous, boisterous, harsh, inclement, severe. See Impertiment. Rude"ly, Rude"ness. Origin: F, fr. L. Rudis. Source: Websters Dictionary (01 Mar 1998) |
| ruderal | <botany> Weedy vegetation growing on compacted, plowed, or otherwise distrubed ground and showing a preference for this type of habitat. (17 Dec 1997) |
| rudiment | 1. That which is unformed or undeveloped; the principle which lies at the bottom of any development; an unfinished beginning. "but I will bring thee where thou soon shalt quit Those rudiments, and see before thine eyes The monarchies of the earth." (Milton) "the single leaf is the rudiment of beauty in landscape." (I. Taylor) 2. Hence, an element or first principle of any art or science; a beginning of any knowledge; a first step. "This boy is forest-born, And hath been tutored in the rudiments of many desperate studies." (Shak) "There he shall first lay down the rudiments Of his great warfare." (Milton) 3. <biology> An imperfect organ or part, or one which is never developed. Origin: L. Rudimentum, fr. Rudis unwrought, ignorant, rude: cf. F. Rudiment. See Rude. Source: Websters Dictionary (01 Mar 1998) |
| rudimenta | The pleural of rudimentum (05 Mar 2000) |
| rudimentary | Poorly developed and not functional. Compare: vestigial, obsolete. (09 Oct 1997) |
| rudimentum | 1. That which is unformed or undeveloped; the principle which lies at the bottom of any development; an unfinished beginning. "but I will bring thee where thou soon shalt quit Those rudiments, and see before thine eyes The monarchies of the earth." (Milton) "the single leaf is the rudiment of beauty in landscape." (I. Taylor) 2. Hence, an element or first principle of any art or science; a beginning of any knowledge; a first step. "This boy is forest-born, And hath been tutored in the rudiments of many desperate studies." (Shak) "There he shall first lay down the rudiments Of his great warfare." (Milton) 3. <biology> An imperfect organ or part, or one which is never developed. Origin: L. Rudimentum, fr. Rudis unwrought, ignorant, rude: cf. F. Rudiment. See Rude. Source: Websters Dictionary (01 Mar 1998) |
| rudimentum hippocampi | A thin layer of gray matter on the dorsal surface of the corpus callosum in which the medial and lateral longitudinal stria lie embedded. The indusium griseum is a rudimentary component of the hippocampus, continuous caudally around the splenium of the corpus callosum with the fasciolar gyrus, a slender convolution in turn continuous with the dentate gyrus of the hippocampus; rostrally the indusium griseum curves around the genu and rostrum of corpus callosum and extends ventralward to the olfactory trigone as the tenia tecta or rudimentum hippocampi, hidden in the depth of the posterior parolfactory sulcus that marks the anterior border of the subcallosal gyrus or precommissural septum. Synonym: supracallosal gyrus. (05 Mar 2000) |
| rudistes | <paleontology> An extinct order or suborder of bivalve mollusks characteristic of the Cretaceous period; called also Rudista. Origin: NL, fr. L. Rudis rough. Source: Websters Dictionary (01 Mar 1998) |
Synonyms :
Synonyms : SIRV-1, SIRV-2, SIRV1, SIRV2, Sulfolobus islandicus Rod Shaped Viruses, Sulfolobus virus SIRV 1, Sulfolobus virus SIRV 2
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| rudiment |
the elementary stages of any subject (usually plural); "he mastered only the rudiments of geometry" the remains of a body part that was functional at an earlier stage of life; "Meckel's diverticulum is the rudiment of the embryonic yolk sac"
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| rudimentary |
fundamental: being or involving basic facts or principles; "the fundamental laws of the universe"; "a fundamental incomatibility between them"; "these rudimentary truths"; "underlying principles" being in the earliest stages of development; "rudimentary plans" vestigial: not fully developed in mature animals; "rudimentary wings"
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| rudimentary bone |
a bone that has only partially developed.
Ãâó: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| rudiment |
the incomplete formation of a part or organ.
Ãâó: www.biology.lsu.edu/heydrjay/ThomasSay/terms.html
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| rudimentary |
not fully developed and not functional; organs in the early stage of development may be rudimentary
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| RUD | a sedimentary rock formed of coarse-grained material |
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| RUD | fossil hominoids from north central Hungary |
| RUD | North American perennial herbs with showy cone-shaped flower heads |
| RUD | the state flower of Maryland |
| RUD | tall leafy plant with erect branches ending in large yellow flower heads with downward-arching rays |
| RUD | very tall branching herb with showy much-doubled yellow flower heads |
| RUD | the state flower of Maryland |
| RUD | European freshwater fish resembling the roach |
| RUD | (nautical) steering mechanism consisting of a hinged vertical plate mounted at the stern of a vessel |
| RUD | a hinged vertical airfoil mounted at the tail of an aircraft and used to make horizontal course changes |
| RUD | the vertical blade on a rudder |
| RUD | fish having the habit of following ships |
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