[ji-joo-nuh m]

noun Anatomy.

the middle portion of the small intestine, between the duodenum and the ileum.

Origin of jejunum

1350–1400; Middle English < Latin jējūnum, noun use of neuter of jējūnus empty, poor, mean; so called because thought to be empty after death
Related formsje·ju·nal, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for jejunum

duodenum, ileum, jejunum, villus

Examples from the Web for jejunum

Historical Examples of jejunum

British Dictionary definitions for jejunum



the part of the small intestine between the duodenum and the ileum
Derived Formsjejunal, adjective

Word Origin for jejunum

C16: from Latin, from jējūnus empty; from the belief that the jejunum is empty after death
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for jejunum

late 14c., from Latin ieiunum, neuter of ieiunus (see jejune). Translating Greek nestis (Galen). So called because it typically is found empty during dissections, perhaps because it would tend to drain in a body laid on its back.

Online Etymology Dictionary, © 2010 Douglas Harper

jejunum in Medicine



n. pl. je•ju•na (-nə)

The section of the small intestine between the duodenum and the ileum.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

jejunum in Science



Plural jejuna

The middle part of the small intestine, connecting the duodenum and the ileum.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.