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Hilum

Noun

hi=lum

WORDNET DICTIONARY

hilum(n = noun.body) hilus - (anatomy) a depression or fissure where vessels or nerves or ducts enter a bodily organ; "the hilus of the kidney"

is a kind of fissure

Derived form adjective hilar₁

hilum(n = noun.plant) Array - the scar on certain seeds marking its point of attachment to the funicle; Array

Derived form adjective hilar₁

Hilum, n. [L., a little thing, trifle.].

The eye of a bean or other seed; the mark or scar at the point of attachment of an ovule or seed to its base or support; -- called also hile. [1913 Webster]
The part of a gland, or similar organ, where the blood vessels and nerves enter; the hilus; as, the hilum of the kidney. [1913 Webster]

Hilum, n. (pl. hila)
1 Bot. the point of attachment of a seed to its seed-vessel.
2 Anat. a notch or indentation where a vessel enters an organ.

Etymology

L, = little thing, trifle

For further exploring for "Hilum" in Webster Dictionary Online