Mean time

Mean time
Mean Mean, a. [OE. mene, OF. meiien, F. moyen, fr. L. medianus that is in the middle, fr. medius; akin to E. mid. See {Mid}.] 1. Occupying a middle position; middle; being about midway between extremes. [1913 Webster]

Being of middle age and a mean stature. --Sir. P. Sidney. [1913 Webster]

2. Intermediate in excellence of any kind. [1913 Webster]

According to the fittest style of lofty, mean, or lowly. --Milton. [1913 Webster]

3. (Math.) Average; having an intermediate value between two extremes, or between the several successive values of a variable quantity during one cycle of variation; as, mean distance; mean motion; mean solar day. [1913 Webster]

{Mean distance} (of a planet from the sun) (Astron.), the average of the distances throughout one revolution of the planet, equivalent to the semi-major axis of the orbit.

{Mean error} (Math. Phys.), the average error of a number of observations found by taking the mean value of the positive and negative errors without regard to sign.

{Mean-square error}, or {Error of the mean square} (Math. Phys.), the error the square of which is the mean of the squares of all the errors; -- called also, {mean square deviation}, {mean error}.

{Mean line}. (Crystallog.) Same as {Bisectrix}.

{Mean noon}, noon as determined by mean time.

{Mean proportional} (between two numbers) (Math.), the square root of their product.

{Mean sun}, a fictitious sun supposed to move uniformly in the equator so as to be on the meridian each day at mean noon.

{Mean time}, time as measured by an equable motion, as of a perfect clock, or as reckoned on the supposition that all the days of the year are of a mean or uniform length, in contradistinction from apparent time, or that actually indicated by the sun, and from sidereal time, or that measured by the stars. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • Mean time — Time Time, n.; pl. {Times}. [OE. time, AS. t[=i]ma, akin to t[=i]d time, and to Icel. t[=i]mi, Dan. time an hour, Sw. timme. [root]58. See {Tide}, n.] 1. Duration, considered independently of any system of measurement or any employment of terms… …   The Collaborative International Dictionary of English

  • mean|time — «MEEN TYM», noun, adverb. –n. the time between. SYNONYM(S): interim, interval. –adv. 1. in the time between. 2. at the same time. mean time, time according to the hour angle of the mean sun, constituting the “ordinary time” or “clock time” of… …   Useful english dictionary

  • Mean Time — est un album de rock du groupe anglais The Barracudas. L abum est produit par Peter Gage. Il est enregistré en octobre et novembre 1982 au Startling Studios, le studio de Ringo Starr, a Ascot en Angleterre. Il ne comprend que des créations… …   Wikipédia en Français

  • mean time — /ˈmin taɪm / (say meen tuym) noun the time at a given place on earth based on a day of 24 hours; the interval between successive local noons on which local time is based varies and so an average day of 24 hours is used, giving mean time. Also,… …  

  • mean time — noun a) A variant spelling of meantime. Mean time between failures b) A mean (average) amount of time …   Wiktionary

  • mean time — vidutinė trukmė statusas T sritis fizika atitikmenys: angl. averaged time; mean time vok. mittlere Zeit, f rus. среднее время, n; усреднённое время, n pranc. temps moyen, m …   Fizikos terminų žodynas

  • Mean time between failures — (MTBF) is the predicted elapsed time between inherent failures of a system during operation.[1] MTBF can be calculated as the arithmetic mean (average) time between failures of a system. The MTBF is typically part of a model that assumes the… …   Wikipedia

  • Mean time to first failure — Mean time (to) first failure (MTFF, sometimes MTTFF) is a concept in reliability engineering. It describes time to failure for non repairable components like an integrated circuit soldered on a circuit board. .[1] For repairable components like a …   Wikipedia

  • Mean Time Between Overhaul — (Mean) Time Between Overhaul (MTBO bzw. TBO) sind synonyme Bezeichnungen der Englischen Sprache für die durchschnittliche Dauer bis zur Überholung von Geräten, Maschinen oder Motoren. MTBO dient als Maß für die Langlebigkeit von Geräten oder… …   Deutsch Wikipedia

  • Mean Time To Recover — Mean Time To Repair (MTTR)[1] wird als die mittlere Reparaturzeit nach einem Ausfall eines Systems definiert. Diese gibt an, wie lange die Wiederherstellung des Systems im Mittel dauert. Sie ist somit ein wichtiger Parameter für die… …   Deutsch Wikipedia

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