international unit


Also found in: Dictionary, Thesaurus, Legal, Financial, Acronyms, Encyclopedia, Wikipedia.

unit

 [u´nit]
1. a single thing; one segment of a whole that is made up of identical or similar segments.
2. a specifically defined amount of anything subject to measurement, as of activity, dimension, velocity, volume, or the like.
3. a distinct part of a hospital, usually having a specific physical location and serving a defined function; see under names of specific units.
Ångström unit angstrom.
atomic mass unit (u) (amu) the unit of mass equal to ¹⁄₁₂ the mass of the nuclide of carbon 12. Called also dalton.
autonomous nursing unit a nursing unit under a decentralized administration system in which the staff is responsible for all aspects of unit functioning.
British thermal unit (BTU) a unit of heat formerly widely used, being the amount necessary to raise the temperature of 1 pound of water from 39° to 40°F., equal to approximately 252 calories.
CH50 unit the amount of complement that will lyse 50 per cent of a standard preparation of sheep red blood cells coated with antisheep erythrocyte antibody.
continuing education unit (CEU) a unit of credit for educational offerings given to professional persons, determined by a professional organization according to a mathematical formula after a thorough review of the program of study, the qualifications of the instructors, and the program objectives.
critical care unit intensive care unit.
electrostatic u's (esu) that system of units that is based on the fundamental definition of a unit charge as one that will repel a similar charge with a force of 1 dyne when the two charges are 1 cm apart in a vacuum.
environmental control unit a computerized system that allows the handicapped individual to operate several different appliances using a keyboard or other input device.
heat unit the amount of heat energy that is produced by one kVp (kilovolt peak) and one mA (milliampere) for one second with single phase, full wave rectified radiographic equipment.
Hounsfield unit an arbitrary unit of x-ray attenuation used for CT scans. Each voxel is assigned a value on a scale in which air has a value of −1000; water, 0; and compact bone, +1000.
intensive care unit see intensive care unit.
International unit (IU)
1. a unit of enzyme activity equal to the amount of enzyme that catalyzes the conversion of one micromole of substrate or coenzyme per minute under specified conditions (temperature, pH, and substrate concentration) of the assay method. Abbreviated U.
2. any of several arbitrary units that have been adopted by international bodies to express the quantities of certain vitamins (A, C, D, and thiamine hydrochloride), hormones (androgen, chorionic gonadotropin, estradiol benzoate, estrone, insulin, progesterone, and prolactin), and drugs (digitalis and penicillin).
Kienböck's unit a unit of x-ray exposure equal to 0.1 erythema dose; symbol X.
motor unit the unit of motor activity formed by a motor nerve cell and its many innervated muscle fibers.
postanesthesia care unit (PACU) a specialty unit in a hospital for giving postanesthesia care (care of patients recovering from anesthesia and intravenous sedation); formerly called recovery room.
radiologic u's units used to measure radiation, including roentgens, rads, rems, and curies.
u's of service (UOS)
1. the number of procedures done by a department.
2. individuals or groups of individuals who are the recipients of nursing care.
short procedures unit (short term care unit) a nursing unit where patients are briefly cared for following a medical or surgical procedure and are then discharged without spending the night.
SI unit any unit of the International System of units (the metric system); see also si units.
step-down unit a nursing unit designated to provide care for patients who are stable enough to be discharged from the intensive care unit but are not yet ready to be cared for on a medical-surgical unit.
Svedberg unit (S) a unit equal to 10−13 second used for expressing sedimentation coefficients of macromolecules.
Svedberg flotation unit (Sf) a unit equal to 10−13 second used for expressing negative sedimentation coefficients of macromolecules that float rather than sink in a centrifuge, e.g., lipoproteins.
terminal respiratory unit the functional unit of the lung, including a respiratory bronchiole, alveolar ducts and sacs, and alveoli; called also primary lobule of lung and primary respiratory lobule.
USP unit one used in the United States Pharmacopeia for expressing potency of drugs and other preparations.

in·ter·na·tion·al u·nit (IU),

the amount of a substance, such as a drug, hormone, vitamin, enzyme, etc., that produces a specific effect as defined by an international body and accepted internationally; for example, for an enzyme it is micromoles of product formed (or substrate consumed) per minute.

international unit

n. Abbr. IU
1. The quantity of a biologically active substance, such as a hormone or vitamin, required to produce a specific response.
2. A unit of potency for similarly active substances, based on this quantity and accepted as an international standard.

International Unit (IU, I.U.)

a unit of measure in the International System of Units. See also SI units.

international unit

Any arbitrarily defined and internationally sanctioned unit of measurement for a naturally-occurring substance–eg, hormone, enzyme or vitamin. See SI Therapeutics Drug concentrationin–µg/mL X 103/MW of drug–g/mole.

in·ter·na·tion·al u·nit

(in'tĕr-nash'ŭn-ăl yū'nit)
The amount of a substance (e.g., drug, hormone, vitamin, enzyme) that produces a specific effect as defined by an international body and accepted internationally.
Synonym(s): unit (4) .

International unit (IU)

A measurement of biological activity in which one IU is equal to one mg (milligram).

in·ter·na·tion·al u·nit

(IU) (in'tĕr-nash'ŭn-ăl yū'nit)
Amount of a substance (e.g., drug, hormone, vitamin, enzyme) that produces specific effect as defined and accepted internationally.

unit

1. a single thing; one segment of a whole that is made up of identical or similar segments.
2. a specifically defined amount of anything subject to measurement, as of activity, dimension, velocity, volume, or the like.

Angstrom unit
atomic mass unit
see dalton.
International unit
1. see si units.
2. a unit of enzyme activity equal to the amount of enzyme that catalyzes the conversion of one micromole of substrate or coenzyme per minute under specified conditions (temperature, pH and substrate concentration) of the assay method. Abbreviated U.
3. any of several arbitrary units that have been adopted by international bodies to express the quantities of certain vitamins (A, C, D and thiamin hydrochloride), hormones (androgen, chorionic gonadotropin, estradiol benzoate, estrone, insulin, progesterone and prolactin), and drugs (digitalis and penicillin).
SI unit
any unit of the International System of units (the metric system). See si units.
References in periodicals archive ?
But what they forget is that by spending just 10 to 20 minutes under the direct sun, they can get 10,000 to 25,000 International Units of Vitamin D3 released into their blood stream.
Cornell cited among other research the Cambridge Heart Antioxidant Study which found that daily supplements of 400 and 800 international units of Vitamin E reduced heart disease risk by 50 percent among more than 2,000 patients with cardiovascular disease.
Number of international units of recombinant coagulation factor VIII minimum of second generation (item 2) 9 084 684
The Cambridge Heart Antioxidant Study found that daily supplements of 400 or 800 international units of Vitamin E reduced heart attack risk by 50 percent among more than 2,000 patients with cardiovascular disease.
The study's vitamin E dose was equivalent to what a person gets by taking a supplement of about 400 international units daily, Wimalawansa says.
The scientists sampled people's blood before and after each received 1,200 international units of vitamin E daily for 3 months.
Ishwarlal Jialal of the University of Texas Southwestern Medicine Center in Dallas described recent experiments in which he gave diabetic and nondiabetic people 1,200 international units (IU) of vitamin E daily.
today announced the opening of restaurants in Cairo and Jakarta, and the purchase of a franchise unit in Glasgow, bringing its total number of international units to 162.
They were part of a group of people, all 65 or older, who had been randomly assigned to consume daily for 3 years either a tablet containing 500 milligrams of calcium and 700 international units of vitamin D or a look-alike placebo.
For vitamin E, which acts as a potent anti-oxidant that may counter atherosclerosis, carcinogenic assaults on cells, cataracts, macular degeneration and premature aging of cells throughout the body, he suggests a dose of 100 to 400 International Units daily.
Banks has held management-level positions and led international units for Vanco Energy Company, Mosbacher Energy Company, Kuwait Foreign Petroleum Company and Santa Fe International Corporation.

Full browser ?