de forest | (n) United States electrical engineer who in 1907 patented the first triode vacuum tube, which made it possible to detect and amplify radio waves (1873-1961), Syn. Lee De Forest, Father of Radio |
prevent | (v) keep from happening or arising; make impossible, Syn. preclude, forestall, forbid, foreclose |
de forest | (n) United States electrical engineer who in 1907 patented the first triode vacuum tube, which made it possible to detect and amplify radio waves (1873-1961), Syn. Lee De Forest, Father of Radio |
prevent | (v) keep from happening or arising; make impossible, Syn. preclude, forestall, forbid, foreclose |