Resonator

Res´o`na`tor Pronunciation: ~n?`t?r

n.	1.	(Acoustics) Anything which resounds; specifically, a vessel in the form of a cylinder open at one end, or a hollow ball of brass with two apertures, so contrived as to greatly intensify a musical tone by its resonance. It is used for the study and analysis of complex sounds.
	2.	(Teleg.) Anything that resounds or resonates;

Noun	1.	resonator - a hollow chamber whose dimensions allow the resonant oscillation of electromagnetic or acoustic waves Synonyms: cavity resonator, resonating chamber
	2.	resonator - an electrical circuit that combines capacitance and inductance in such a way that a periodic electric oscillation will reach maximum amplitude Synonyms: resonant circuit
	3.	resonator - any system that resonates