Barium x-ray
gi series.
gastrointestinal series: x-ray examination of the upper or lower gastrointestinal tract after barium sulfate is given rectally (barium enema) or orally as a contrast medium.
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see under barium chromate. a yellow, crystalline compound, bacro 4 , used as a pigment (barium yellow)
- Bark beetle
any of numerous small, cylindrical beetles of the family scolytidae that nest under the bark of hardwood trees, leaving intricate tracings on the wood. historical examples in the winter of 1953-54 before much mortality had occurred, the bark beetle infestations had become conspicuous. the forest habitat of the university of kansas natural history reservation henry […]
- Bark cloth
any cloth, as tapa, made by soaking and pounding the inner bark of certain trees. fabric woven to resemble such cloth, used for upholstery, bedcovers, etc. historical examples she had a quiet modest demeanour, though her dress was but a narrow fork clout of bark cloth. in darkest africa, vol. 1; or, the quest, rescue […]
- Barkhausen effect
the phenomenon of short, sudden changes in the magnetism of a ferromagnetic substance occurring when the intensity of the magnetizing field is continuously altered. noun the phenomenon that ferromagnetic material in an increasing magnetic field becomes magnetized in discrete jumps, discovered by heinrich georg barkhausen (1881–1956)
- Barklouse
any of numerous insects of the order psocoptera that live on the bark of trees and other plants.