Boyau
Pronunciation : Boy"au
Part of Speech : n.;
Etymology : [F. boyau gut, a long and narrow place, and (of trenches) a branch. See Bowel.] (Fort.)
Definition : Defn: A winding or zigzag trench forming a path or communication from one siegework to another, to a magazine, etc.
pl. Boyaux or Boyaus.
Source : Webster's Unabridged Dictionary, 1913