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duodena

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du⋅o⋅de⋅num

  [doo-uh-dee-nuhm, dyoo-; doo-od-n-uhm, dyoo-]
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–noun, plural du⋅o⋅de⋅na  [doo-uh-dee-nuh, dyoo-; doo-od-n-uh, dyoo-] , du⋅o⋅de⋅nums. Anatomy, Zoology.
the first portion of the small intestine, from the stomach to the jejunum.

Origin:
1350–1400; ME < ML, by ellipsis from intestīnum duodēnum digitōrum intestine of twelve fingerbreadths, with original gen. pl. construed as neut. sing.; L duodēnī twelve each (here lacking distributive sense)
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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du·o·de·num   (dōō'ə-dē'nəm, dyōō'-, dōō-ŏd'n-əm, dyōō-)   
n.   pl. du·o·de·na (dōō'ə-dē'nə, dyōō'-, dōō-ŏd'n-ə, dyōō-) or du·o·de·nums
The beginning portion of the small intestine, starting at the lower end of the stomach and extending to the jejunum.

[Middle English, from Medieval Latin, short for intestīnum duodēnum digitōrum, intestine of twelve finger-widths (in length), from Latin duodēnum, genitive pl. of duodēnī, twelve each, from duodecim, twelve; see duodecimal.]
du'o·de'nal (dōō'ə-dē'nəl, dyōō'-, dōō-ŏd'n-əl, dyōō-) adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Cultural Dictionary

duodenum [(dooh-uh-dee-nuhm, dooh-od-n-uhm)]

The first part of the small intestine, located just below the stomach. (See digestive system.)

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

duodenum 
1398, from M.L. duodenum digitorium "space of twelve digits," from L. duodeni "twelve each." Coined by Gerard of Cremona (d.1187), who translated "Canon Avicennae," a loan-transl. of Gk. dodekadaktylon, lit. "twelve fingers long," the intestine part so called by Gk. physician Herophilus (c.353-280 B.C.E.) for its length, about equal to the breadth of twelve fingers.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: duodena
plural of DUODENUM

Main Entry: du·o·de·num
Pronunciation: "d(y)ü-&-'dE-n&m, d(y)u-'äd-&n-&m
Function: noun
Inflected Form: plural du·o·de·na /-'dE-n&, -&n-&/ or -de·nums
: the first, shortest, and widest part of thesmall intestine that in humans is about 10 inches (25 centimeters) long and that extends from the pylorus to the undersurface of the liver where it descends for a variable distance and receives thebile and pancreatic ducts and then bends to the left and finally upward to join the jejunum near the second lumbar vertebra —du·o·de·nal /-'dEn-&l, -&n-&l/ adjective
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

duodenum du·o·de·num (d&oomacr;'ə-dē'nəm, dy&oomacr;'-, d&oomacr;-ŏd'n-əm, dy&oomacr;-)
n. pl. du·o·de·nums or du·o·de·na (d&oomacr;'ə-dē'nə, dy&oomacr;'-, d&oomacr;-ŏd'n-ə, dy&oomacr;-)
The beginning portion of the small intestine, starting at the lower end of the stomach and extending to the jejunum.

du'o·de'nal (d&oomacr;'ə-dē'nəl, dy&oomacr;'-, d&oomacr;-ŏd'n-əl, dy&oomacr;-) adj.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary
duodenum   (d'ə-dē'nəm, d-ŏd'n-əm)  Pronunciation Key 
Plural duodena or duodenums
The beginning part of the small intestine, starting at the lower end of the stomach and extending to the jejunum.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
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