Imperfect power

(Math.) a number which can not be produced by taking any whole number or vulgar fraction, as a factor, the number of times indicated by the power; thus, 9 is a perfect square, but an imperfect cube.

See also: Imperfect

References in periodicals archive ?
Regarding the powers of soul, Aquinas states that "the more imperfect powers precede the others in the order of generation, for the animal is generated before the man.