Contained in another, but not dividing it evenly: applied to a number which does not measure another without a remainder: thus, 5 is an aliquant part of 16, for 3 times 5 are 15, leaving a remainder 1.
the GNU version of the Collaborative International Dictionary of English
adjective.
An aliquant part of a number or quantity is one which does not divide it without leaving a remainder; thus, 5 is an aliquant part of 16. Opposed to aliquot.