| ball valve | Any of a variety of prosthetic cardiac valve's comprised of a ball within a retaining cage affixed to the orifice; when appropriately sized, used in aortic, mitral, or tricuspid position. (05 Mar 2000) |
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| ball valve action | The intermittent blockage of a tube or outlet of a cavity by some object or material that permits passage in one direction but not in the other. (05 Mar 2000) |
| ball variance | Swelling and changes in shape and consistency of the ball in a ball-valve prosthesis, especially in one replacing the aortic valve. (05 Mar 2000) |
| Ball's operation | Division of the sensory nerve trunks supplying the anus, for relief of pruritus ani. (05 Mar 2000) |
| Ball, Sir Charles | <person> Irish surgeon, 1851-1916. See: Ball's operation. (05 Mar 2000) |
| ball-and-socket joint | A multiaxial synovial joint in which a more or less extensive sphere on the head of one bone fits into a rounded cavity in the other bone, as in the hip joint. Synonym: articulatio spheroidea, articulatio cotylica, cotyloid joint, enarthrodial joint, enarthrosis, socket joint, spheroid articulation, spheroid joint. (05 Mar 2000) |
| ball-valve thrombus | Ball thrombus intermittently occluding the mitral or tricuspid orifice. (05 Mar 2000) |
| ballad | A popular kind of narrative poem, adapted for recitation or singing; as, the ballad of Chevy Chase; especially, a sentimental or romantic poem in short stanzas. Origin: OE. Balade, OF. Balade, F. Ballade, fr. Pr. Ballada a dancing song, fr. Ballare to dance; cf. It. Ballata. See Ball, and Ballet. Source: Websters Dictionary (01 Mar 1998) |
| Ballance's sign | <clinical sign> The presence of a dull percussion note in both flanks, constant on the left side but shifting with change of position on the right, said to indicate ruptured spleen; the dullness is due to the presence of blood, fluid on the right side but coagulated on the left. (05 Mar 2000) |
| Ballance, Sir Charles | <person> English surgeon, 1856-1936. See: Ballance's sign, Koerte-Ballance operation. (05 Mar 2000) |
| ballast | 1. To steady, as a vessel, by putting heavy substances in the hold. 2. To fill in, as the bed of a railroad, with gravel, stone, etc, in order to make it firm and solid. 3. To keep steady; to steady, morally. "'T is charity must ballast the heart." (Hammond) Origin: Ballasted; Ballasting. Source: Websters Dictionary (01 Mar 1998) |
| ballerina-foot pattern | A vigorous posteromedial contraction of the left ventricle coupled with convexity anteriorly sometimes resulting from poor contraction of the opposing anterior wall; it is the most frequent dyssynergy observed in the prolapsed mitral valve leaflet syndrome (even with a normal anterior wall) and produces a configuration of angiographic dye in the right anterior oblique projection resembling a ballerina's foot; sometimes called dancer's foot malformation. (05 Mar 2000) |
| balling gun | Balling iron An instrument used for administering boluses or capsules to animals. (05 Mar 2000) |
| ballism | A type of involuntary movement affecting the proximal limb musculature, manifested as jerking, flinging movements of the extremity; caused by a lesion of or near the contralateral subthalamic nucleus. Usually only one side of the body is involved, resulting in hemiballismus. Synonym: ballism. Origin: G. Ballismos, a jumping about (05 Mar 2000) |
| ballismus | A type of involuntary movement affecting the proximal limb musculature, manifested as jerking, flinging movements of the extremity; caused by a lesion of or near the contralateral subthalamic nucleus. Usually only one side of the body is involved, resulting in hemiballismus. Synonym: ballism. Origin: G. Ballismos, a jumping about (05 Mar 2000) |
| baldy calf |
a calf with a lethal inherited condition characterized by alopecia, cracked and ulcerated skin, elongated feet, and hypersalivation.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| Balke protocol |
Balke-Ware protocol, a procedure for assessing cardiovascular health using a graded treadmill exercise test in which the treadmill speed is held constant and its slope increased, with the incremental increases in work so closely spaced as to approach continuity.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| balloon atrial septostomy |
Rashkind balloon atrial septostomy, surgical creation of an opening in the interatrial septum of the heart by passage of a balloon catheter from the right atrium through the septum to the left atrium, at which point the balloon is inflated and the catheter is then withdrawn to create an interatrial septal defect; performed in transposition of the great vessels with an intact septum.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| balm |
(balm) (bahm) [Fr. baume] 1. a healing or soothing medicine. 2. a plant of the genus Melissa, especially M. officinalis; it is carminative and aromatic. 3. b. of Gilead. 4. balsam.
출처: www.mercksource.com/ppdocs/us/common/dorlands/dorl...
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| balanced polymorphism |
Balancing selection refers to forms of natural selection which work to maintain genetic polymorphisms (or multiple alleles) within a population. Balancing selection is in contrast to directional selection which favor a single allele. A balanced polymorphism is a situation in which balancing selection within a population is able to maintain stable frequencies of two or more phenotypic forms. ...
출처: en.wikipedia.org/wiki/Balanced_polymorphism
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| BAL | having balconies or a balcony |
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| BAL | a platform projecting from the wall of a building and surrounded by a balustrade or railing or parapet |
| BAL | an upper floor projecting from the rear over the main floor in an auditorium |
| BAL | grow bald |
| BAL | lacking hair on all or most of the scalp |
| BAL | without the natural or usual covering |
| BAL | with no effort to conceal |
| BAL | common cypress of southeastern United States having trunk expanded at base |
| BAL | smaller than and often included in the closely related Taxodium distichum |
| BAL | large North American eagle having a white head and dark wings and body |
| BAL | North American hornet |
| BAL | lacking hair on all or most of the scalp |