Reference > Brewer’s Dictionary > Ravelin (The) or demi-lune,

 Rava’na,Raven. 
CONTENTS · BIBLIOGRAPHIC RECORD
E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
 
Ravelin (The) or demi-lune,
 
in fortification. A work with two faces, forming a salient angle, placed beyond the main ditch, opposite the curtain (q.v.), and separated from the covered way (q.v.) by a ditch which runs into the main ditch.   1
 


 Rava’na,Raven. 

 
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