Pronunciation: (rez'u-nā"tur), [key]
1. anything that resonates.
2. an appliance for increasing sound by resonance.
3. an instrument for detecting the presence of a particular frequency by means of resonance.
a. a hollow enclosure (cavity resonator) made of conducting material of such dimensions that electromagnetic radiation of a certain frequency will resonate.
b. any circuit having this frequency characteristic.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.