res·o·na·tor 
(rĕzə-nā′tər)
(rĕzə-nā′tər)n.
1. A resonating system.
2. A hollow chamber or cavity with dimensions chosen to permit internal resonant oscillation of electromagnetic or acoustical waves of specific frequencies.
3. A resonant circuit.
- degenderize
- degeneracy
- degenerate
- degenerately
- degenerateness
- degeneration
- degenerative
- degenerative joint disease
- de Gennes
- deglaciation
- deglamorize
- deglaze
- deglutinate
- deglutination
- deglutition
- deglutitory
- degradability
- degradable
- degradation
- degradative
- degrade
- degraded
- degradedly
- degradedness
- degrader