power


power
1. In optics, the refractive vergence of a lens. 2. In physics and engineering, the rate at which work is done. 3. The exponent of a number or expression that provides the number of times that number has to be multiplied by itself.
- back vertex p. the effective p. of a lens as measured from a surface toward the eye; a standard for measurement of ophthalmic lenses.
- carbon dioxide combining p. a measurement of the total CO2 that can be bound as HCO2 at a PCO2 of 40 mmHg at 25°C by serum, plasma, or whole blood.
- equivalent p. the p. equal to an infinitely thin lens as measured on an optical bench.
- resolving p. 1. definition of a lens; in a microscope objective lens it is calculated by dividing the wavelength of the light used by twice the numerical aperture of the objective. SEE ALSO: definition. 2. analogies to other modalities, e.g., two-point discrimination in neurologic examination. Commonly misinterpreted as random error, although it has none of its properties. 3. SYN: resolution (2).
- statistical p. in Neyman-Pearson hypothesis testing, the probability of rejecting the null hypothesis when it is false; the complement of an error of the second kind.
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pow·er 'pau̇(-ə)r n
1) an inherent property or effect <a drug that enhances the heart's pumping \power (Kathleen Fackelmann)>
2) MAGNIFICATION (2b)

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pow·er (pouґər) [L. posse to have power] 1. capability; potency; the ability to act. 2. a measure of magnification, as of a microscope. 3. the rate at which work is done. Symbol P. The SI unit of power is the watt. 4. of a statistical test: the probability of correctly rejecting the null hypothesis when a specified alternative holds true; it is equal to 1 minus the probability of a Type II error.

Medical dictionary. 2011.

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  • power — pow·er n 1: capability of acting or of producing an effect parties of unequal bargaining power 2 a: authority or capacity to act that is delegated by law or constitution often used in pl. commerce power often cap C&P: the power delegated to… …   Law dictionary

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  • power — is the concept which is at the heart of the subject of social stratification . It is therefore not surprising that we have seen so many disputes concerning its meaning (including disputes about what particular sociologists meant when they used… …   Dictionary of sociology

  • power — n 1 Power, force, energy, strength, might, puissance mean the ability to exert effort for a purpose. Power is the most general of these terms and denotes an ability to act or be acted upon, to effect something, or to affect or be affected by… …   New Dictionary of Synonyms

  • Power — Pow er, n. [OE. pouer, poer, OF. poeir, pooir, F. pouvoir, n. & v., fr. LL. potere, for L. posse, potesse, to be able, to have power. See {Possible}, {Potent}, and cf. {Posse comitatus}.] 1. Ability to act, regarded as latent or inherent; the… …   The Collaborative International Dictionary of English

  • POWER — (сокр. от англ. Performance Optimization With Enhanced RISC)  микропроцессорная архитектура с ограниченным набором команд (RISC), разработанная и развиваемая компанией IBM. Название позже было расшифровано как Performance Optimization… …   Википедия

  • power — [pou′ər] n. [ME pouer < OFr poeir, earlier poter, orig. inf. < VL * potere, to be able, for L posse, to be able: see POTENT] 1. ability to do, act, or produce 2. a specific ability or faculty [the power of hearing] 3. great ability to do,… …   English World dictionary

  • Power — (englisch für Kraft, Macht, Energie) oder Teststärke beschreibt in der Statistik die Aussagekraft eines statistischen Tests. Die Teststärke gibt an, mit welcher Wahrscheinlichkeit ein Signifikanztest zugunsten einer spezifischen… …   Deutsch Wikipedia

  • Power — Saltar a navegación, búsqueda Power (en castellano: poder) puede referirse a: Contenido 1 Cine 2 Apellido 3 Informática 4 Véase también …   Wikipedia Español

  • Power FM — Allgemeine Informationen Empfang analog terrestrisch Webradio Sendegebiet Bulgarien (UKW) …   Deutsch Wikipedia

  • power — ► NOUN 1) the ability to do something or act in a particular way. 2) the capacity to influence other people or the course of events. 3) a right or authority given or delegated to a person or body. 4) political authority or control. 5) physical… …   English terms dictionary


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