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.
- Adm.
- adman
- admeasure
- admeasurement
- admeasurer
- Admetus
- admin
- administer
- administrable
- administrant
- administrate
- administration
- administrative
- administrative assistant
- administrative law judge
- administratively
- administrative segregation
- administrator
- administrivia
- admirable
- admirableness
- admirably
- admiral
- Admiral of the Fleet
- admiralty