phase resonance

phase resonance

[′fāz ‚rez·ən·əns]
(physics)
The frequency at which the angular phase difference between the fundamental components of an oscillation and of the applied agency is 90° (π/2 radians). Also known as velocity resonance.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.