rec·tum /ˈrɛktəm/
直腸
rec·tum /ˈrɛktəm/ 名詞
(拉)直腸,背側肛(動物)
Rec·tum n. Anat. The terminal part of the large intestine; -- so named because supposed by the old anatomists to be straight. See Illust. under Digestive.
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rectum
n : the terminal section of the alimentary canal; from the
sigmoid flexure to the anus
[also: recta (pl)]