单词 | ravelin |
释义 | ravelin/ˈravlɪn /noun historical An outwork of fortifications, with two faces forming a salient angle, constructed beyond the main ditch and in front of the curtain.A ravelin is a V shaped fortification used to protect the entrance of a fort....
OriginLate 16th century: from French, from obsolete Italian ravellino, of unknown origin. Rhymes |
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