| Boerhaave's syndrome | <syndrome> Named after Captain Boerhaave, a Dutch ship captain, who was the first patient this condition was described in. Traumatic rupture of the lower oesophagus can occur with significant blunt chest trauma, during CPR or in some conditions of forceful protracted vomiting. This condition is much more common in the patient with a pre-existing oesophageal disease such as reflux oesophagitis. The chest X-ray will typically show an abnormal left cardiac border with free fluid within the left hemithorax (pleural effusion). Patients will experience immediate chest pain, which may radiate to the neck, accompanied by shock, sepsis and death within 48 hours if untreated. (27 Sep 1997) |
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| Boerhaave, Hermann | <person> Dutch physician, 1668-1738. See: Boerhaave's glands, Boerhaave's syndrome. (05 Mar 2000) |
| bog | A quagmire covered with grass or other plants, wet, spongy ground, a small marsh, plant community on wet, very acid peat. (09 Oct 1997) |
| bog spavin | A chronic synovitis of the tibiotarsal joint in the horse resulting in distention of the joint capsule with fluid; it usually causes little or no lameness. (05 Mar 2000) |
| bogbean | buckbean |
| bogberry | <botany> The small cranberry (Vaccinium oxycoccus), which grows in boggy places. Source: Websters Dictionary (01 Mar 1998) |
| Bogros' serous membrane | A membrane of the episcleral space (of Tenon). (05 Mar 2000) |
| Bogros' space | A triangular space between the peritoneum and the transversalis fascia, at the lower angle of which is the inguinal ligament; it contains the lower portion of the external iliac artery. Synonym: Bogros' space, spatium retroinguinale. (05 Mar 2000) |
| Bogros, Antoine | <person> 19th century French anatomist. See: Bogros' serous membrane. (05 Mar 2000) |
| Bogros, Jean-Annet | <person> French anatomist, 1786-1823. See: Bogros' space. (05 Mar 2000) |
| bogsucker | <zoology> The American woodcock; so called from its feeding among the bogs. Source: Websters Dictionary (01 Mar 1998) |
| bogue | <zoology> The boce; called also bogue bream. See Boce. Source: Websters Dictionary (01 Mar 1998) |
| bogwood | The wood of trees, especially. Of oaks, dug up from peat bogs. It is of a shining black or ebony colour, and is largely used for making ornaments. Source: Websters Dictionary (01 Mar 1998) |
| bohemian | 1. Of or pertaining to Bohemia, or to the language of its ancient inhabitants or their descendants. See Bohemian. 2. Of or pertaining to a social gypsy or "Bohemian" (see Bohemian, 3); vagabond; unconventional; free and easy. "Hers was a pleasant Bohemian life till she was five and thirty." (Blackw. Mag) "Artists have abandoned their Bohemian manners and customs nowadays." (W. <zoology> Black) Bohemian chatterer, or Bohemian waxwing, a small bird of Europe and America (Ampelis garrulus); the waxwing. Bohemian glass, a variety of hard glass of fine quality, made in Bohemia. It is of variable composition, containing usually silica, lime, and potash, rarely soda, but no lead. It is often remarkable for beauty of colour. Source: Websters Dictionary (01 Mar 1998) |
| bohm diffusion | <radiobiology> A rapid loss of plasma across magnetic field lines caused by microinstabilities. Theory formulated by the physicist David Bohm. Semiempirical formula for the diffusion coefficient given by Bohm in 1946 (noted by Bohm, Burhop, and Massey, who were developing a magnetic arc for use in uranium isotope separation). Bohm diffusion was proposed (not derived from first principles) to scale as 1/B rather than the 1/B^2 scaling predicted by classical diffusion. A 1/B scaling results from assuming that particles diffuse across field lines at an optimum rate (effective collision frequency=cyclotron frequency). The 1/B scaling is observed (approximately) in most reactors. See: diffusion, microinstabilities, field lines. (09 Oct 1997) |