Backbone
Backbone: The spine. A flexible row of bones stretching from the base of the skull to the tailbone.
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- Background radiation
Background radiation: Radiation that comes from environmental sources including the earth’s crust, the atmosphere, cosmic rays, and radioisotopes. Natural sources of radiation account for the largest amount of radiation exposure received by most people each year with medical and occupational sources accounting for only a fraction of that exposure. It is currently believed that radon, […]
- Bacteremia
Bacteremia: The presence of live bacteria in the bloodstream. Bacteremia is analogous to viremia (the presence of a virus in the blood) and parasitemia (the presence of a parasite in the blood). Bacteremia, viremia and parasitemia are all forms of sepsis (bloodstream infection). The term “bacteremia” was compounded from “bacteria” and “-emia” (in the blood). […]
- Bacteria
Bacteria: Single-celled microorganisms that can exist either as independent (free-living) organisms or as parasites (dependent on another organism for life). The plural of bacterium. Examples of bacteria include Acidophilus, a normal inhabitant of yogurt; Gonococcus which causes gonorrhea; Clostridium welchii, the most common cause of gangrene; E. coli, which lives in the colon and can […]
- Bacterial
Bacterial: Of or pertaining to bacteria, as in a bacterial lung infection.
- Bacterial artificial chromosome
Bacterial artificial chromosome: A laboratory creation involving an artificially constructed chromosome in which medium-sized segments of DNA (100,000 to 300,000 bases in length) that come from another species are cloned into bacteria. Once the foreign DNA has been cloned into the bacteria’s chromosome, many copies of it can be made (amplified) and sequenced. Bacterial artificial […]