noun
- a condition in which the small airways in the lungs become inflamed by a virus. It is most common in infants, who become breathless in severe cases. Recurrent attacks may lead to asthma
n.
- Inflammation of the bronchioles, often associated with bronchopneumonia.
- An acute viral infection of the bronchioles seen mostly in infants and young children, caused most frequently by the respiratory syncytial virus.