- Mean distance
- 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.*

### Look at other dictionaries:

**mean distance**— n. the average of the greatest and least distances in the orbit of a celestial body from its focus … English World dictionary**mean distance**— noun the arithmetic mean of the maximum and minimum distances of a celestial body (satellite or secondary star) from its primary • Hypernyms: ↑distance * * * noun : the arithmetical mean of the maximum and minimum distances of a planet, satellite … Useful english dictionary**mean distance**— vidutinis nuotolis statusas T sritis fizika atitikmenys: angl. mean distance vok. mittlerer Abstand, m rus. среднее расстояние, n pranc. distance moyenne, f … Fizikos terminų žodynas**mean distance**— noun Date: 1830 the arithmetical mean of the maximum and minimum distances of an orbiting celestial object from its primary … New Collegiate Dictionary**mean distance**— Astron. the arithmetic mean of the greatest and least distances of a planet from the sun, used in stating the size of an orbit; the semimajor axis. [1885 90] * * * … Universalium**mean distance**— /min ˈdɪstns/ (say meen distns) noun the arithmetic mean of the greatest and least distances of a planet from the sun, called the semi major axis, and used in stating the size of an orbit … Australian English dictionary**mean distance between failure**— noun A measure of reliability that expresses the average distance travelled by a type of lorry, bus, rolling stock, etc, before preventative or reparative maintenance is required … Wiktionary**mean distance to the sun**— 240 million miles; used to specify the headroom in convertibles … Dictionary of automotive terms**Mean inter-particle distance**— (or mean inter particle separation) is the mean distance between microscopic particles (usually atoms or molecules) in a macroscopic body. Contents 1 Ambiguity 2 Ideal gas 2.1 Nearest neighbor distribution … Wikipedia**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… … The Collaborative International Dictionary of English