The Collaborative International Dictionary
Tenaillon
Tenaillon \Te*nail"lon\, n. [F. See Tenaille.] (Fort.) A work constructed on each side of the ravelins, to increase their strength, procure additional ground beyond the ditch, or cover the shoulders of the bastions.
Wiktionary
tenaillon
n. A work constructed on each side of the ravelins to increase their strength, procure additional ground beyond the ditch, or cover the shoulders of the bastions.