What does "rhonchial" mean?

Rhonchial: Of or pertaining to a rhonchus; produced by rhonchi. Rhonchial fremitus. Etym: [L. fremitus a dull roaring or murmuring.] (Med.) A vibration of the chest wall that may be felt by the hand laid upon its surface. It is caused in the production of rhonchi in the bronchial tubes.