(adj) the sound heard in auscultation resembling the hollow sound made by blowing across the mouth of a bottle, Example:amphoric breathing indicates a cavity in the lung
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
a. (Med.) Resembling a sound like that produced by blowing into an empty bottle; especially, a respiratory sound heard over cavities in the lungs during percussion and auscultation; as, amphoric respiration or resonance. [ 1913 Webster + AS ]