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Definition of: duodenum
(d
′ə·dē′nəm, dy′-, d·od′ə·nəm) noun plural ·na (-nə) Anat.
That part of the small intestine extending from the pylorus to the jejunum. [<Med. L duodenum (digitorum) of twelve (fingers) <duodecim twelve; with ref. to its length]
—du′o·de′nal adjective
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