Pronunciation: (trOOd"l-OO'), [key]
—pl. trous-de-loupPronunciation: (trOOd"l-OO'). [key] Mil.
a conical or pyramidal pit with a pointed stake fixed vertically in the center, rows of which are dug in front of a fortification to hinder an enemy's approach, formerly used chiefly against cavalry.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.