| bifurcatio trunci pulmonalis | The division of the pulmonary trunk into right and left pulmonary arteries. Synonym: bifurcatio trunci pulmonalis. (05 Mar 2000) |
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| bifurcation | Split into two parts. A change in the stability or in the types of solutions which occurs as a parameter is varied in a dissipative dynamic system. The change can be seen as a bifurcation point in a graph of the parameter being varied vs. One of the properties of the solutions. (09 Oct 1997) |
| bifurcation lymph nodes | Several large lymph nodes inferior to the tracheal bifurcation; they receive afferents from the bronchopulmonary nodes and the heart, and send efferents to the superior tracheobronchial and tracheal nodes. Synonym: nodi lymphatici tracheobronchiales inferiores, bifurcation lymph nodes, carinal lymph nodes. (05 Mar 2000) |
| bifurcation of aorta | The division of the aorta into right and left common iliac arteries; it occurs at the level of the fourth and fifth lumbar vertebral body. Synonym: bifurcatio aortae. (05 Mar 2000) |
| bifurcation of pulmonary trunk | The division of the pulmonary trunk into right and left pulmonary arteries. Synonym: bifurcatio trunci pulmonalis. (05 Mar 2000) |
| bifurcation of trachea | The division of the trachea into the right and left main bronchi; it occurs at the level of the fifth or sixth thoracic vertebral body and is marked internally by the presence of a carina or keel-like ridge between the diverging bronchi. Synonym: bifurcatio tracheae. (05 Mar 2000) |
| big | 1. Having largeness of size; of much bulk or magnitude; of great size; large. "He's too big to go in there." 2. Great with young; pregnant; swelling; ready to give birth or produce; often figuratively. "[Day] big with the fate of Cato and of Rome." (Addison) 3. Having greatness, fullness, importance, inflation, distention, etc, whether in a good or a bad sense; as, a big heart; a big voice; big looks; to look big. As applied to looks, it indicates haughtiness or pride. "God hath not in heaven a bigger argument." (Jer. Taylor) Big is often used in self-explaining compounds; as, big-boned; big-sounding; big-named; big-voiced. To talk big, to talk loudly, arrogantly, or pretentiously. "I talked big to them at first." (De Foe) Synonym: Bulky, large, great, massive, gross. Origin: Perh. From Celtic; cf. W. Beichiog, beichiawg, pregnant, with child, fr. Baich burden, Arm. Beac'h; or cf. OE. Bygly, Icel. Biggiligr, (properly) habitable; (then) magnigicent, excellent, fr. OE. Biggen, Icel. Byggja, to dwell, build, akin to E. Be. Source: Websters Dictionary (01 Mar 1998) |
| big axillary nodes and normal breasts | <radiology> Consider: lymphoma, leukaemia, rheumatoid arthritis (12 Dec 1998) |
| big brain | <molecular biology> Neurogenic gene of Drosophila, believed to encode a product involved in cell cell communication, perhaps via gap junctions. Member of the major intrinsic protein family. (18 Nov 1997) |
| big-head | 1. In horses, usually denotes osteodystrophia fibrosa. 2. Gas gangrene infection of tissues of the head, caused by Clostridium novyi in sheep, usually young rams with head wounds. 3. Photosensitization in sheep. 4. An acute disease of young rams caused by the Clostridium novyi, C. Sordellii or, rarely, C. Chauvoei and characterised by a nongaseous, nonhemorrhagic, edematous swelling of the head and neck. (05 Mar 2000) |
| bigaminate | <botany> Having a forked petiole, and a pair of leaflets at the end of each division; biconjugate; twice paired; said of a decompound leaf. Origin: Pref. Bi- + geminate. Source: Websters Dictionary (01 Mar 1998) |
| bigaroon | <botany> The large white-heart cherry. Origin: F. Bigarreau, fr. Bigarre variegated. Source: Websters Dictionary (01 Mar 1998) |
| Bigelow's ligament | <anatomy> A triangular ligament attached by its apex to the anterior inferior spine of the ilium and rim of the acetabulum, and by its base to the anterior intertrochanteric line of the femur; the strong medial band is attached to the lower part of the intertrochanteric line; the strong lateral part is fixed to the tubercle at the upper part of this line; the bands diverge, forming a Y-like figure with a weak area between; among the strongest of the body's ligaments, it limits extension at the hip joint. Synonym: ligamentum iliofemorale, Bertin's ligament, Bigelow's ligament, hypsiloid ligament, Y-shaped ligament. (05 Mar 2000) |
| Bigelow's septum | A bony spur springing from the underside of the neck of the femur above and anterior to the lesser trochanter, adding to the strength of this part of the bone. Synonym: Bigelow's septum. (05 Mar 2000) |
| Bigelow, Henry | <person> U.S. Surgeon, 1818-1890. See: Bigelow's ligament, Bigelow's septum. (05 Mar 2000) |