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Webster 1913 Edition

Glacis

Gla′cis

,
Noun.
[F.
glacis
; – so named from its smoothness. See
Glacier
.]
A gentle slope, or a smooth, gently sloping bank; especially
(Fort.)
, that slope of earth which inclines from the covered way toward the exterior ground or country (see Illust. of
Ravelin
).

Webster 1828 Edition

Glacis

GLA'CIS

,
Noun.
In building, or gardening, an easy, insensible slope.
1.
In fortification, a sloping bank; that mass of earth which serves as a parapet to the covered way, having an easy slope or declivity towards the champaign or field.

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