(mathematics) Any of various theorems that saliently concern mean values.

(engineering) The predicted mean average time taken for a part or system to fail for the first time.

Used to ask the meaning of a word (replace “…” with a word).

A phenomenon whereby violence-related content of mass media makes viewers believe that the world is more dangerous than it actually is.

(mathematics) A mean of two numbers which is the common limit of a pair of sequences, whose terms are defined by taking the arithmetic and geometric means of the previous pair of terms.

plural of mean absolute deviation

(statistics) In a set of data, the average of the absolute values of the deviations from a chosen central point.

Mean solar time at the Greenwich Meridian.

(mathematics, of a set of numbers or values) The square root of the arithmetic mean of the squares.

the average length of a solar day, used for practical timekeeping