| rugulose | Covered with tiny wrinkles. (09 Oct 1997) |
|---|---|
| Ruhemann's purple | A blue-violet dye formed in the reaction of ninhydrin with amino acids. (05 Mar 2000) |
| ruhmkorff's coil | <physics> See Induction coil, under Induction. Origin: So called from its inventor, Ruhmkorff, a german physicist. Source: Websters Dictionary (01 Mar 1998) |
| ruin | To fall to ruins; to go to ruin; to become decayed or dilapidated; to perish. "Though he his house of polished marble build, yet shall it ruin like the moth's frail cell." (Sandys) "If we are idle, and disturb the industrious in their business, we shall ruin the faster." (Locke) Source: Websters Dictionary (01 Mar 1998) |
| rukh | 1. The roc. 2. <zoology> A large bird, supposed by some to be the same as the extinct Epiornis of Madagascar. Origin: Srr Roc. Source: Websters Dictionary (01 Mar 1998) |
| RUL | <abbreviation> Right upper lobe (of lung). (05 Mar 2000) |
| rule | A statement of conditions, effects, or phenomena typically observed in agiven situation or process. (09 Oct 1997) |
| rule of bigeminy | Rule that a ventricular premature beat will follow the beat terminating a long cycle. Sudden prolongation of the ventricular cycle, by changing the refractoriness in the conduction system, causes a peripheral region of bidirectional block to become transiently unidirectional and thus opens potential pathways for reentry to occur. (05 Mar 2000) |
| rule of nines | Method used in calculating body surface area involved in burns whereby values of 9 or 18 percent of surface area are assigned to specific regions as follows: Head and neck, 9%; anterior thorax, 18%; posterior thorax, 18%; arms, 9% each; legs, 18% each; perineum 1%. (05 Mar 2000) |
| rule of outlet | An obstetric rule for determining whether the pelvic outlet will permit the passage of a foetus; the sum of the posterior sagittal diameter and the transverse diameter of the outlet must equal at least 15 cm if a normal-sized baby is to pass. (05 Mar 2000) |
| ruler | 1. One who rules; one who exercises sway or authority; a governor. "And he made him ruler over all the land." (Gen. Xii. 43) "A prince and ruler of the land." (Shak) 2. A straight or curved strip of wood, metal, etc, with a smooth edge, used for guiding a pen or pencil in drawing lines. Cf. Rule, 7 . Parallel ruler. See Parallel. Source: Websters Dictionary (01 Mar 1998) |
| rum | Old-fashioned; queer; odd; as, a rum idea; a rum fellow. Origin: Formerly rome, a slang word for good; possibly of Gypsy origin; cf. Gypsy rom a husband, a gypsy. Source: Websters Dictionary (01 Mar 1998) |
| rum nose | A manifestation of severe acne rosacea resulting in significant enlargement of the nose and occurring primarily in men. It is caused by hypertrophy of the sebaceous glands and surrounding connective tissue. The nose is reddened and marked with numerous telangiectasias. (12 Dec 1998) |
| rum-blossom | A manifestation of severe acne rosacea resulting in significant enlargement of the nose and occurring primarily in men. It is caused by hypertrophy of the sebaceous glands and surrounding connective tissue. The nose is reddened and marked with numerous telangiectasias. (12 Dec 1998) |
| rumen | <zoology> The first four stomach compartments in ruminant animals (such as cattle and deer). (17 Dec 1997) |