Definition of "hilus" [‖Hi•lus]

• A hilum. (noun)

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• "The hollow or concave side of the kidneys is turned inwards, and the deep fissure of this side, known as the hilus, widens out to form the pelvis."
• "Notice that all the vessels leave and enter the kidney at the hilus."
• "Through the hilus the renal artery passes into each kidney, and from each hilus passes outwards the renal vein, a branch of the inferior vena cava."