| RA | radioactive; ragocyte; ragweed antigen; rapidly adapting [receptors]; reactive arthritis; reciprocal... |
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| RH | radiant heat; radiation hybrid; radiological health; reactive hyperemia; recurrent herpes; regulator... |
| RS | radioscaphoid; random sample; rating schedule; Raynaud syndrome; recipient's serum; rectal sinus; re... |
| RUL | right upper eyelid; right upper lateral; right upper limb; right upper lobe |
| LMS | lateral medullary syndrome; left main stem [coronary artery]; leiomyosarcoma; Licentiate in Medicine... |
| lobar bronchi | The divisions of the main bronchi that supply the lobes of the lungs; superior lobar bronchi, bronchus lobaris superior; middle lobar bronchi, bronchus lobaris medius; and inferior lobar bronchi, bronchus lobaris inferior are the three lobar bronchi on the right; superior lobar bronchi, bronchus lobaris superior, and inferior lobar bronchi, bronchus lobaris inferior are the two on the left. The lobar bronchi divide into segmental bronchi. Synonym: bronchi lobares. (05 Mar 2000) |
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| main | 1. Very or extremely strong. "That current with main fury ran." (Daniel) 2. Vast; huge. "The main abyss." 3. Unqualified; absolute; entire; sheer. "It's a man untruth." . 4. Principal; chief; first in size, rank, importance, etc. "Our main interest is to be happy as we can." (Tillotson) 5. Important; necessary. "That which thou aright Believest so main to our success, I bring." (Milton) By main force, by mere force or sheer force; by violent effort; as, to subdue insurrection by main force. "That Maine which by main force Warwick did win." (Shak) By main strength, by sheer strength; as, to lift a heavy weight by main strength. Main beam, the principal or true keel of a vessel, as distinguished from the false keel. Synonym: Principal, chief, leading, cardinal, capital. Origin: From Main strength, possibly influenced by OF. Maine, magne, great, L. Magnus. Cf. Magnate. Source: Websters Dictionary (01 Mar 1998) |
| main d'accoucheur | Position of the hand in tetany or in muscular dystrophy; the fingers are flexed at the metacarpophalangeal joints and extended at the phalangeal joints, with the thumb flexed and adducted into the palm; in resemblance to the position of the physician's hand in making a vaginal examination. Synonym: main d'accoucheur, obstetrical hand. (05 Mar 2000) |
| main en crochet | A permanent flexure of the fourth and fifth fingers, resembling the hand of a woman crocheting with three fingers bent to guide the thread. (05 Mar 2000) |
| main en griffe | Atrophy of the interosseous muscles of the hand with hyperextension of the metacarpophalangeal joints and flexion of the interphalangeal joints. Synonym: main en griffe. (05 Mar 2000) |
| main en lorgnette | A deformity of the hand seen in chronic absorptive arthritis, the fingers and wrists being shortened and the covering skin wrinkled into transverse folds; the phalanges appear to be retracted into one another like an opera glass or miniature telescope. Synonym: main en lorgnette. (05 Mar 2000) |
| main fourchee | A congenital deformity in which the division between the fingers, especially between the third and fourth, extends into the metacarpal region. See: lobster-claw deformity. Synonym: main fourchee, split hand. (05 Mar 2000) |
| main succulente | Oedema of the hand with coldness and lividity of the skin, observed in syringomyelia. Synonym: main succulente. (05 Mar 2000) |
| aortico-left ventricular tunnel | Congenital connection between the aorta above exit of coronary arteries and the left ventricle. (05 Mar 2000) |
| apicoposterior branch of left superior pulmonary vein | <anatomy, vein> Drains apicoposterior bronchopulmonary segment of superior lobe of left lung. Synonym: ramus apicoposterior venae pulmonalis sinistrae superioris. (05 Mar 2000) |
| atrial function, left | The haemodynamic and electrophysiological action of the left atrium. (12 Dec 1998) |
| auricle of left atrium | The small conical projection from the left atrium of the heart. Synonym: auricula sinistra, left auricular appendage. (05 Mar 2000) |
| bilateral left-sidedness | A syndrome in which normally unpaired organs develop more symmetrically in mirror image; two spleens, one on each side, are usually present, and cardiovascular anomalies are common. Synonym: polysplenia syndrome. (05 Mar 2000) |
| cardiac notch of left lung | The notch in the anterior border of the superior lobe of the left lung which accommodates the pericardium. Synonym: incisura cardiaca pulmonis sinistri. (05 Mar 2000) |
| ventricular dysfunction, left | A condition in which the left ventricle of the heart exhibits a decreased functionality. This decreased function could lead to congestive heart failure or myocardial infarction, among other cardiovascular diseases. Diagnostic measurements that indicate this condition include a diminished ejection fraction and a depressed level of motility of the left ventricular wall. (12 Dec 1998) |