1) Irish boy name 2) Type of fortification 
detached work with two embankments
• (n.) A detached work with two embankments which make a salient angle. It is raised before the curtain on the counterscarp of the place. Formerly called demilune, and half-moon.
Outwork with two faces forming a salient angle; like in a star-shaped fort.
Outwork with two faces forming a salient angle; like in a star-shaped fort.
Triangular outwork, built in a ditch of a fort to split the attacking force and cause confusion.
outwork with two embankments forming a salient angle
Fortified structure, more or less triangular in plan, sited in the ditch to defend the curtain.
Rave'lin (răv'lĭn; 277) noun [ F.; confer Spanish rebellin , Italian revellino , rivellino ; perhaps from Latin re- again + vallum wall.] (Fort.) A detached work with two embankments which make a salient angle. It is raised before the curtain on th...
In fortifications a ravelin is a detached work with two embankments which make a salient angle. It is raised before the curtain on the counter-scarp of the place.
outwork with two embankments forming a salient angle