| BSU | Bartholin, Skene, urethral [glands]; basic structural unit; British standard unit |
|---|---|
| CFU-S, | CFUS colony-forming unit, spleen; colony-forming unit, stem cells |
| CRU | cardiac rehabilitation unit; clinical research unit |
| ECU | environmental control unit; extended care unit; extensor carpi ulnaris |
| ESU | electrosurgical unit; electrostatic unit |
| unit of penicillin | The penicillin activity of 0.6 ug of penicillin G. (05 Mar 2000) |
|---|---|
| unit of radioactivity | See: Becquerel. (05 Mar 2000) |
| unit of thyrotrophic activity | The activity of an amount of an extract of the anterior lobe of the hypophysis which, given daily for 5 days, will cause the thyroid of a guinea pig (weighing 200 g) to reach a weight of 600 mg. (05 Mar 2000) |
| unit of vasopressin | The pressor activity of 0.5 mg of the USP Posterior-pituitary Reference Standard; 1 mg of synthetic vasopressin corresponds to 600 IU. (05 Mar 2000) |
| unit of wavelength | See: Angstrom, nanometer. (05 Mar 2000) |
| unit of weight | See: unit of mass. (05 Mar 2000) |
| unit of work | See: unit of energy. (05 Mar 2000) |
| USP unit | A unit as defined and adopted by the United States Pharmacopeia. (05 Mar 2000) |
| Fishman-Lerner unit | A unit of serum acid phosphatase activity based upon measurement of the amount of phenol released from a phenylphosphate substrate. (05 Mar 2000) |
| Florey unit | <microbiology> The minimum amount of penicillin which will prevent the growth of Staphylococcus aureus over an area 26 mm in diameter in a standard culture medium; 1 unit equals 0.6 ug of crystalline sodium salt of penicillin. Synonym: Florey unit. (05 Mar 2000) |
| focus-forming unit | A measurement of the concentration of live virus in a given amount of fluid. This is measured by spreading a known amount of the fluid over a layer of cultured cells which are infected by the virus, then counting the number of areas in the culture which look infected. (09 Oct 1997) |
| laminar air flow unit | An air-filtering system used at some transplant facilities to remove particulate matter and fungi from the air. (16 Dec 1997) |
| lung unit | A respiratory bronchiole together with the alveolar ducts and sacs and pulmonary alveoli into which the respiratory bronchiole leads, considered by some to include the terminal bronchiole and its subdivisions, and called a pulmonary acinus. (05 Mar 2000) |
| adamantine membrane | The primary enamel cuticle, consisting of two extremely thin layers (the inner one clear and structureless, the outer one cellular), covering the entire crown of newly erupted teeth and subsequently abraded by mastication; it is evident microscopically as an amorphous material between the attachment epithelium and the tooth. Synonym: cuticula dentis, adamantine membrane, dental cuticle, membrana adamantina, Nasmyth's cuticle, Nasmyth's membrane, skin of teeth. (05 Mar 2000) |
| allantoid membrane | An embryonic diverticulum of the hindgut of reptiles, birds, and mammals; in man its blood vessels give rise to those of the umbilical cord. (12 Dec 1998) |