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rectifier
rectify
rectilinear
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rectum

rec·tum [ réktəm ] (plural rec·tums or rec·ta [ réktə ])


noun 
Definition:
 
lower part of intestine: the lower part of the large intestine, between the colon and the anal canal

[15th century. < Latin (intestinum) rectum "straight (intestine)" < rectus "straight, right"]

rec·tal adjective
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