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Webster 1913 Edition

‖

Noun.

;

pl.

Boyaux

Boyaus

[F.

boyau

gut, a long and narrow place, and (of trenches) a branch. See

(Fort.)

A winding or zigzag trench forming a path or communication from one siegework to another, to a magazine, etc.

Noun.

boy'o. In fortification, a ditch covered with a parapet, serving as a communication between two trenches.