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Webster 1913 Edition


Ravelin

Rave′lin

(răv′lĭn; 277)
,
Noun.
[F.; cf. Sp.
rebellin
, It.
revellino
,
rivellino
; perhaps fr. L.
re-
again +
vallum
wall.]
(Fort.)
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
.

Webster 1828 Edition


Ravelin

RAV'ELIN

, n.
In fortification, a detached work with two faces which make a salient angle, without any flanks, and raised before the counterscarp, of the place. In this it differs from a half moon, which is placed before an angle.