| PFU | plaque-forming unit; pock-forming unit |
|---|---|
| PICU | pediatric intensive care unit; pulmonary intensive care unit |
| PSU | photosynthetic unit; primary sampling unit |
| PU | palindromic unit; passed urine; pepsin unit; peptic ulcer; pregnancy urine; 6-propyluracil; prostati... |
| RTU | real-time ultrasonography; relative time unit; renal transplantation unit |
| Kienbock's unit | An obsolete unit of X-ray dosage equivalent to 1/10 the erythema dose. (05 Mar 2000) |
|---|---|
| King-Armstrong unit | The quantity of phosphatase that, acting upon disodium phenylphosphate in excess, at pH 9 for 30 min, liberates 1 mg of phenol. Synonym: King-Armstrong unit. (05 Mar 2000) |
| King unit | The quantity of phosphatase that, acting upon disodium phenylphosphate in excess, at pH 9 for 30 min, liberates 1 mg of phenol. Synonym: King-Armstrong unit. (05 Mar 2000) |
| unit | 1. A single thing or person. 2. <mathematics> The least whole number; one. "Units are the integral parts of any large number." (I. Watts) 3. A gold coin of the reign of James I, of the value of twenty shillings. 4. Any determinate amount or quantity (as of length, time, heat, value) adopted as a standard of measurement for other amounts or quantities of the same kind. 5. <mathematics> A single thing, as a magnitude or number, regarded as an undivided whole. Abstract unit, the unit of numeration; one taken in the abstract; the number represented by 1. The term is used in distinction from concrete, or determinate, unit, that is, a unit in which the kind of thing is expressed; a unit of measure or value; as 1 foot, 1 dollar, 1 pound, and the like. Complex unit, an imaginary number of the form a + b-1, when a^2 + b^2 = 1. Duodecimal unit, a unit in the scale of numbers increasing or decreasing by twelves. Fractional unit, the unit of a fraction; the reciprocal of the denominator; thus, 1/4 is the unit of the fraction 3/4. Integral unit, the unit of integral numbers, or 1. Physical unit, a value or magnitude conventionally adopted as a unit or standard in physical measurements. The various physical units are usually based on given units of length, mass, and time, and on the density or other properties of some substance, for example, water. See Dyne, Erg, Farad, Ohm, Poundal, etc. <biology> Unit deme, stress per unit of area; intensity of stress. It is expressed in ounces, pounds, tons, etc, per square inch, square foot, or square yard, etc, or in atmospheres, or inches of mercury or water, or the like. Origin: Abbrev. From unity. Source: Websters Dictionary (01 Mar 1998) |
| unit character | <genetics> A particular trait or characteristic (usually controlled by a single gene or a set of inseparable genes) that is passed on as a unit in heredity. (09 Oct 1997) |
| unit dose | Occurring in or using a single dose, seen as a standard of measurement. (18 Nov 1997) |
| unit fibrils | The fibril's that comprise a collagen fibre, ranging from 20 to 200 nm and averaging about 100 nm in diameter (substantially larger in tendons), with cross-striations averaging 64 nm. Synonym: collagen fibrils. (05 Mar 2000) |
| unit membrane | <cell biology> The three ply, approximately 7nm wide membrane structure found in all cells, composed of a fluid lipid bilayer with intercalated proteins. The unit membrane theory carries with it the presumption that all biological membranes have basically the same structure. (18 Nov 1997) |
| unit of convergence | See: meter angle. (05 Mar 2000) |
| unit of energy | CGS system: erg, joule, MKS system: newton-meter (joule), FPS system: foot-poundal,gravitational unit: gram-centimeter, gram-meter, kilogram-meter, foot-pound,SI: joule. (05 Mar 2000) |
| unit of force | CGS system: dyne, FPS system: poundal, MKS system: newton,SI: newton. (05 Mar 2000) |
| unit of heat | Calorie (gram calorie; kilocalorie) Synonym: British thermal unit. Synonym: joule. (05 Mar 2000) |
| unit of intermedin | A unit based upon the action of the hormone in causing the expansion of the melanophores in a hypophysectomised frog; equal to 1 ug of alkali-treated USP Posterior-pituitary Reference Standard. (05 Mar 2000) |
| unit of length | Metric system and SI: meter, CGS system: centimeter, variable in the English system: inch for short distances, foot for moderate distances and for elevation, mile for long distances. (05 Mar 2000) |
| unit of light | See: candela, lux. (05 Mar 2000) |