zero-divisor

[ zeer-oh-di-vahy-zer ]
/ ˈzɪər oʊ dɪˈvaɪ zər /

noun Mathematics.

a nonzero element of a ring such that its product with some other nonzero element of the ring equals zero.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019