hilum

noun
hi·​lum | \ ˈhī-ləm How to pronounce hilum (audio) \
plural hila\ ˈhī-​lə How to pronounce hila (audio) \

Definition of hilum

1 : a scar on a seed (such as a bean) marking the point of attachment of the ovule
2 : a notch in or opening from a bodily part suggesting the hilum of a bean

First Known Use of hilum

circa 1753, in the meaning defined at sense 1

History and Etymology for hilum

New Latin, from Latin, trifle

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The first known use of hilum was circa 1753

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Cite this Entry

“Hilum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hilum. Accessed 20 Sep. 2020.

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More Definitions for hilum

hilum

noun
hi·​lum | \ ˈhī-ləm How to pronounce hilum (audio) \
plural hila\ -​lə How to pronounce hila (audio) \

Medical Definition of hilum

1 : a scar on a seed (as a bean) marking the point of attachment of the ovule
2 : a notch in or opening from a bodily part suggesting the hilum of a bean especially when it is where the blood vessels, nerves, or ducts leave and enter: as
a : the indented part of a kidney
b : the depression in the medial surface of a lung that forms the opening through which the bronchus, blood vessels, and nerves pass
c : a shallow depression in one side of a lymph node through which blood vessels pass and efferent lymphatic vessels emerge

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