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


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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


Theodor, Swedish chemist and Nobel laureate, 1884-1971. See: Svedberg equation, Svedberg of flotation, Svedberg unit.
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive ?
(54.) Svedberg interview; representative of anonymous FBO interview; McCallum interview.
Asked about what kind of investors have contributed to the Baltic Fund, Svedberg indicated that this covered a wide range, not only highrisk speculators, but also pension funds, banks, institutions and private individuals.
"Luckily, when we explained this to Svedberg, they kindly offered Jane her choice from their latest range, so we were able to pick a suite that was just as pretty, but a lot more practical in such a small area."
The rate of settling allowed the molecular weights of proteins to be determined with reasonable accuracy, and for this work Svedberg was awarded the Nobel Prize for chemistry in 1926.
According to the company, Svedberg has exercised her full holding of 1,250 warrants, which gave her the right to subscribe for 37 shares per warrant at a price of SEK 5.41 per share.
"You have to get ready right away and it all happens pretty quick,'' Svedberg said.
Hexanal has been detected in domestic pellet storage rooms--the emissions varied with ambient temperature and peaked after 2 months of storage during warm weather (Svedberg et al.
The splendid Kungsbacka Trio certainly entered into the spirit of the piece: pianist Simon Crawford-Phillips mustered a wealth of meaning from his endless broken chords, while violinist Malin Broman and cellist Jesper Svedberg gave expressive depth and breadth to this (let's be honest) shallow music.
The programme will be Beethoven - Piano Trio in D, op.70 no.1 (The Ghost); Ravel - Piano Trio in A Minor; and Schubert - Piano Trio in B Flat D.898 Kungsbacka Piano Trio are Malin Broman (violin) / Jesper Svedberg (cello) / Simon Crawford Phillips (piano).
Feychting M, Pedersen NL, Svedberg P, Floderus B, Gatz M.
Camera (color, widescreen), Hans-Gunther Bucking;, editors, Peter Przygodda, Olivier Grothoff; music, Irmin Schmidt; production designers, Bengt Svedberg, Asa Nilson; costume designer, Andreas Janczyk; sound (Dolby Digital), Roland Winke; assistant directors, Chris Tromboukis, Regine Stier; casting, Nessie Nesslauer, Horst D.
"Extension" - Works from the Collection, No, 2, curated by Margaretha Rossholm Lagerlof, John Bock, Louise Bourgeois, Miriam Backstrom, Walter De Maria, Charlotte Gyllenhammer, David Hammons, Siobhan Hapaska, Annika von Hausswolff, Edward & Nancy Kienholz, Louise Lawler, Bjarne Melgaard, Jockum Nordstrom, Ulf Rahmberg, Cindy Sherman, Yinka Shonibare, Lena Svedberg, Lawrence Weiner Through May 15