| IOU | intensive care observation unit; international opacity unit |
|---|---|
| IRU | industrial rehabilitation unit; interferon reference unit |
| IU | immunizing unit; international unit; intrauterine; in utero; 5-iodouracil |
| KU | kallikrein unit; Karmen unit |
| LU | left upper [limb]; loudness unit; Lupron; lytic unit |
| unit of mass | Metric system: gram, SI: kilogram, english system: pound. (05 Mar 2000) |
|---|---|
| unit of ocular convergence | The amount of convergence required to view binocularly an object 1 meter distant and exerting 1 diopter of accommodation. Synonym: unit of ocular convergence. (05 Mar 2000) |
| unit of oxytocin | The oxytocic activity of 0.5 mg of the USP Posterior-pituitary Reference Standard; 1 mg of synthetic oxytocin corresponds to 500 IU. (05 Mar 2000) |
| 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) |