Definition, Meaning & Synonyms

hilum

noun

/ˈhaɪ.lʌm/

Definition

The hilum is a small, often indented region on an organ or plant where blood vessels, lymphatic vessels, nerves, or other structures connect.

Examples

The hilum of the kidney is where the renal artery and vein enter and exit.
In plants, the hilum is the scar left on a seed where it was attached to its fruit.
Doctors often examine the hilum of the lungs to observe the patterns of blood vessels.

Meaning

In a biological context, the hilum refers to the area on an organ or plant where connections occur, such as the entrance and exit points for vessels and ducts.