| arian | <ethnology> See Aryan. Source: Websters Dictionary (01 Mar 1998) |
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| Arias-Stella | Javier, Peruvian pathologist, *1924. See: Arias-Stella effect, Arias-Stella phenomenon, Arias-Stella reaction. (05 Mar 2000) |
| Arias-Stella effect | Focal, unusual, decidual changes in endometrial epithelium, consisting of intraluminal budding, and nuclear enlargement and hyperchromatism with cytoplasmic swelling and vacuolation; may be associated with ectopic or uterine pregnancy. Synonym: Arias-Stella effect, Arias-Stella reaction. (05 Mar 2000) |
| Arias-Stella phenomenon | Focal, unusual, decidual changes in endometrial epithelium, consisting of intraluminal budding, and nuclear enlargement and hyperchromatism with cytoplasmic swelling and vacuolation; may be associated with ectopic or uterine pregnancy. Synonym: Arias-Stella effect, Arias-Stella reaction. (05 Mar 2000) |
| Arias-Stella reaction | Focal, unusual, decidual changes in endometrial epithelium, consisting of intraluminal budding, and nuclear enlargement and hyperchromatism with cytoplasmic swelling and vacuolation; may be associated with ectopic or uterine pregnancy. Synonym: Arias-Stella effect, Arias-Stella reaction. (05 Mar 2000) |
| ariboflavinosis | Properly hyporiboflavinosis: a nutritional condition produced by a deficiency of riboflavin in the diet, characterised by cheilosis and magenta tongue and usually associated with other manifestations of B vitamin deficiency. (05 Mar 2000) |
| aricine | <chemistry> An alkaloid, first found in white cinchona bark. Origin: From Arica, in Chile. Source: Websters Dictionary (01 Mar 1998) |
| Arie-Pitanguy mammaplasty | A procedure to reduce a large breast by a lozenge-shaped resection of tissue from its inferior pole. Synonym: Arie-Pitanguy mammaplasty. (05 Mar 2000) |
| Arie-Pitanguy operation | A procedure to reduce a large breast by a lozenge-shaped resection of tissue from its inferior pole. Synonym: Arie-Pitanguy mammaplasty. (05 Mar 2000) |
| ariel gazelle | <zoology> A variety of the gazelle (Antilope, or Gazella, dorcas), found in Arabia and adjacent countries. A squirrel-like Australian marsupial, a species of Petaurus. A beautiful Brazilian toucan Ramphastos ariel). Origin: Ar. Aryil, ayyil, stag. Source: Websters Dictionary (01 Mar 1998) |
| aries | 1. <astronomy> The Ram; the first of the twelve signs in the zodiac, which the sun enters at the vernal equinox, about the 21st of March. A constellation west of Taurus, drawn on the celestial globe in the figure of a ram. 2. A battering-ram. Origin: L. Source: Websters Dictionary (01 Mar 1998) |
| aril | A fleshy outgrowth that partially or completely surrounds the seed in someplants. (09 Oct 1997) |
| arillus | <botany> A exterior covering, forming a false coat or appendage to a seed, as the loose, transparent bag inclosing the seed or the white water lily. The mace of the nutmeg is also an aril. Origin: From LL. Arilli dry grapes, perh. Fr. L. Aridus dry: cf. F,. Arille. Source: Websters Dictionary (01 Mar 1998) |
| arise | 1. To come up from a lower to a higher position; to come above the horizon; to come up from one's bed or place of repose; to mount; to ascend; to rise; as, to arise from a kneeling posture; a cloud arose; the sun ariseth; he arose early in the morning. 2. To spring up; to come into action, being, or notice; to become operative, sensible, or visible; to begin to act a part; to present itself; as, the waves of the sea arose; a persecution arose; the wrath of the king shall arise. "There arose up a new king . . . Which knew not Joseph." (Ex. I. 8) "The doubts that in his heart arose." (Milton) 3. To proceed; to issue; to spring. "Whence haply mention may arise Of something not unseasonable to ask." (Milton) Origin: AS. Arisan; a (equiv. To Goth. Us-, ur-, G. Er-, orig. Meaning out) + risan to rise; cf. Goth. Urreisan to arise. See Rise. Source: Websters Dictionary (01 Mar 1998) |
| arista | <botany> An awn. Origin: L. Source: Websters Dictionary (01 Mar 1998) |