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Definition of: hilum
(hī′ləm) noun plural ·la (-lə)
1. Bot. The scar on a seed indicating its point of attachment; also, the nucleus of a starch grain or the eye of a bean.
2. Anat. The fissurelike interval where ducts, vessels, and nerves enter and leave an organ. Also hi′lus (-ləs). [<L, a trifle]
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