(astronomy, celestial mechanics) An angle of 𝜏 (radians) divided by the orbital period (of a celestial body in an elliptic orbit).

(astronomy, celestial mechanics) An imaginary celestial body (corresponding to another, real, orbiting one) which orbits with constant speed along an auxiliary circle (a circle which shares a diameter with the major axis of the elliptical orbit of the corresponding real celestial body), such that its position coincides with the position of the corresponding, real celestial body when that body passes through periapsis.

(astronomy, celestial mechanics) An orbital parameter of a celestial body (in an elliptic orbit); the mean motion multiplied by the time since the last passage through periapsis; the angle PCM (measured in radians) defined by P = the periapsis, C = the center of the elliptical orbit, and M = the mean planet.

The geometric mean.

plural of mean proportional

The average of the squares of a set of numbers.

The mean absolute deviation. / A commonly accepted standard or value.

(idiomatic) To be loved or cared about a great deal by.

(mathematics) A measure of central tendency of a set of n values computed by extracting the nth root of the product of the values.

(statistics, probability) The measure of central tendency of a set of values computed by dividing the sum of the values by their number; commonly called the mean or the average.