The Collaborative International Dictionary of English v.0.48:
innumerate \innumerate\ adj. Lacking knowledge and understanding of mathematical concepts and methods; by analogy with illiterate. Opposite of numerate. Also See: educated; illiterate. [WordNet 1.5]WordNet (r) 3.0 (2006):
innumerate adj 1: lacking knowledge and understanding of mathematical concepts and methods [ant: numerate]