truncation error

English Thesaurus

1. (mathematics) a miscalculation that results from cutting off a numerical calculation before it is finished (noun.act)

hypernym	:	miscalculation, misestimation, misreckoning,
definition	:	a mistake in calculating (noun.act)

domain category	:	math, mathematics, maths,
definition	:	a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement (noun.cognition)