WordReference Random House Unabridged Dictionary of American English © 2026
dif•frac•tive
(di frak′tiv),USA pronunciation adj.
dif•frac′tive•ly, adv.
dif•frac′tive•ness, n.
- Physicscausing or pertaining to diffraction.
- diffract + -ive 1820–30
dif•frac′tive•ness, n.