Hypertext Webster Gateway: "Rectum"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Rectum \Rec"tum\ (-t?m), n. [NL. (sc. intestinum), fr. L. rectus
straight. See {Right}.] (Anat.)
The terminal part of the large intestine; -- so named because
supposed by the old anatomists to be straight. See Illust.
under {Digestive}.
From WordNet (r) 1.7 (wn)
rectum
n : the terminal section of the alimentary canal; from the
sigmoid flexure to the anus
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