noun
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the deep or rich quality sound; sonorous sound.
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the sound (in the chest, abdomen, etc.) heard with the aid of a stethoscope, to determine the condition of the heart, lungs, etc.
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the sound or musical note reinforced and elongated by reflection or by sympathetic vibration of other bodies; a resonant note.
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a large vibration produced by a small stimulus of approx. the same frequency as that of the system; resonance.