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Webster 1913 Edition

Noun.

[

Hind

, a. +

gut

(Anat.)

The posterior part of the alimentary canal, including the rectum, and sometimes the large intestine also.

hindgut ‎(plural hindguts)

(anatomy) The caudal part of the alimentary canal of an embryo, including the colon and the rectum

anatomy: the caudal part of the alimentary canal of an embryo