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hi·lum of lung[TA]
1. a wedge-shaped depression on the mediastinal surface of each lung, where the bronchus, blood vessels, nerves, and lymphatics enter or leave the viscus.
2. radiologically, the composite shadow of the main pulmonary arteries, veins, and lymph nodes in the lung root adjacent to the anatomic hilum.
A pulmonary hilus for the entry and exit of the bronchi, nerves, and vessels.
See also: porta