The increase in diameter of the bronchi and bronchioles because the airway muscles are relaxed.

Widening of the airways, a result of relaxation of the smooth muscle.

describes the opening up of the airways in the lung

a dilated (open) state of a bronchus.

The dilation of the bronchial passages; can be caused by sympathetic stimulation.

opening or expanding the bronchial tubes. Bronchodilating drugs can reduce coughing, wheezing and/or shortness of breath, and may help prevent coughing if given prior to therapy with aerosolized pentamidine.