Jejunum definition

jə-jo͝onəm
Frequency:
The section of the small intestine between the duodenum and the ileum.
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The middle part of the small intestine, between the duodenum and the ileum.
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The section of the small intestine between the duodenum and the ileum.
noun
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The middle part of the small intestine, connecting the duodenum and the ileum.
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(anatomy) The central of the three divisions of the small intestine which lies between the duodenum and the ileum.
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Other Word Forms

Noun

Singular:
jejunum
Plural:
jejuna

Origin of jejunum

  • Middle English from Medieval Latin iēiūnum (intestīnum) fasting (intestine) (so called because in dissection it was always found empty) neuter of Latin iēiūnus

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Latin ieiunum, neuter of iēiūnus.

    From Wiktionary