| 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) |
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| 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) |
| rudmasday | Either of the feasts of the Holy Cross, occuring on May 3 and September 14, annually. See: Rood, Mass, Day. Source: Websters Dictionary (01 Mar 1998) |
Synonyms :
Synonyms : Russell Viper, Russells Viper, Viper, Russell's, russelii, Vipera
Synonyms : Russian Federation (Europe), Russian SFSR
Synonyms : Russia (Pre 1917)
Synonyms : Russo-Japanese War, 1904-1905, Russian Japanese War, Russo Japanese War, 1904 1905
| 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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| ruga |
(anatomy) a fold or wrinkle or crease; "rugae of the stomach"
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| rugose |
of leaves; ridged or wrinkled
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| rule |
a principle or condition that customarily governs behavior; "it was his rule to take a walk before breakfast"; "short haircuts were the regulation" convention: something regarded as a normative example; "the convention of not naming the main character"; "violence is the rule not the exception"; "his formula for impressing visitors" prescribed guide for conduct or action (linguistics) a rule describing (or prescribing) a linguistic practice principle: a basic generalization that is accepted as true and that can be used as a basis for reasoning or conduct; "their principles of composition characterized all their works" govern: exercise authority over; as of nations; "Who is governing the country now?" principle: a rule or law concerning a natural phenomenon or the function of a complex system; "the principle of the conservation of mass"; "the principle of jet propulsion"; "the right-hand rule for inductive fields" the duration of a monarch's or government's power; "during the rule of Elizabeth" decide with authority; "The King decreed that all firstborn males should be killed" dominion: dominance or power through legal authority; "France held undisputed dominion over vast areas of Africa"; "the rule of Caesar" predominate: be larger in number, quantity, power, status or importance; "Money reigns supreme here"; "Hispanics predominate in this neighborhood" decide on and make a declaration about; "find someone guilty" directions that define the way a game or sport is to be conducted; "he knew the rules of chess" any one of a systematic body of regulations defining the way of life of members of a religious order; "the rule of St. Dominic" have an affinity with; of signs of the zodiac mark or draw with a ruler; "rule the margins" (mathematics) a standard procedure for solving a class of mathematical problems; "he determined the upper bound with Descartes' rule of signs"; "he gave us a general formula for attacking polynomials" keep in check; "rule one's temper" measuring stick consisting of a strip of wood or metal or plastic with a straight edge that is used for drawing straight lines and measuring lengths
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| RU | any of numerous trees or shrubs or vines of the family Rubiaceae |
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| RU | an order of dicotyledonous plants of the subclass Asteridae |
| RU | a yellow or orange variety of ruby spinel |
| RU | a line that when crossed permits of no return and typically results in irrevocable commitment |
| RU | the boundary in ancient times between Italy and Gaul |
| RU | inclined to a healthy reddish color often associated with outdoor life |
| RU | a soft silvery metallic element of the alkali metal group |
| RU | a method of dating based on the decay of rubidium-87 into the stable isotope strontium-87 |
| RU | make ruby red |
| RU | test to determine the patency of the Fallopian tubes |
| RU | Russian composer and pianist (1829-1894) |
| RU | United States pianist (born in Poland) known for his interpretations of the music of Chopin (1886-1982) |