harmonic mean The harmonic mean (h) of a set of given numbers a1, a2, a3, . . ., an is defined as the reciprocal of the arithmetic mean of 1/a1, 1/a2, 1/a3, . . ., 1/an, that is, h = n / (1/a1 + 1/a2 + 1/a3 + . . . + 1/an)

Related Terms: arithmetic mean, geometric mean, mean (average)