
1) Barbacan 2) Non-alcoholic drink 3) Tower
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https://www.crosswordclues.com/clue/barbican

1) Barbacan
Found on
https://www.crosswordclues.com/clue/barbican

A barbican is a fortified outpost or gateway, such as an outer defense to a city or castle, or any tower situated over a gate or bridge which was used for defensive purposes. Usually barbicans were situated outside the main line of defences and connected to the city walls with a walled road called the neck. In the 15th century, with the improvemen...
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http://en.wikipedia.org/wiki/Barbican

projecting watchtower over the gate of a castle
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http://phrontistery.info/b.html

• (n.) Alt. of Barbacan
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http://thinkexist.com/dictionary/meaning/barbican/

area in the City of London containing residential towers and Barbican Centre, a complex of theatres, halls, and cultural facilities. The London ... [1 related articles]
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http://www.britannica.com/eb/a-z/b/20

(from the article `castle`) ...the gateways by drawbridgesi.e., bridges that could be drawn back or raised from the inner side in order to prevent the moats from being crossed. ...
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http://www.britannica.com/eb/a-z/b/20

fortified outwork defending the gate of a castle or town
Found on
http://www.castles-of-britain.com/glossary.htm

The gateway or outworks defending the drawbridge.
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http://www.castlesontheweb.com/glossary.html

The gateway or outworks defending the drawbridge.
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http://www.encyclo.co.uk/local/20018

A passage to the entrance of a castle that projects forward of the main curtain wall, with walls to either side. This will force an attacking force into a small space and in an intended direction. The attackers can then be attacked from above and the sides. Examples are at Prudhoe and Alnwick castles, (both Northumberland), of the 14th century. Th...
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http://www.encyclo.co.uk/local/20766

outwork defending the entrance to a castle. Often a walled passage projecting from the front of the gatehouse which had large spaces in the roof, or no roof at all, so that defenders could fire upon any attackers trapped inside. It often had its own doors, portcullis and drawbridge in addition to those in the main gatehouse.
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http://www.encyclo.co.uk/local/22129

Advanced fortification work protecting the gateway of a city or castle.
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http://www.encyclo.co.uk/visitor-contributions.php

A barbican is a tower or advanced work defending the entrance to a castle or city, for example at a gate or bridge. It was often large and strong, having a ditch and drawbridge of its own. The term barbican was also applied to an opening in the wall of a fortress, through which missiles were discharged upon an enemy.
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http://www.probertencyclopaedia.com/browse/FB.HTM

HMS Barbican was a British Barricade Class boom defence vessel of 730 tons displacement launched in 1938. HMS Barbican had a top speed of 11.75 knots and carried a complement of 32. She was armed with a 3-inch anti-aircraft gun.
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http://www.probertencyclopaedia.com/browse/RB.HTM

[
n] - a tower that is part of a defensive structure (such as a castle)
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http://www.webdictionary.co.uk/definition.php?query=barbican

outwork defending the entrance to a castle. Often a walled passage projecting from the front of the gatehouse which had large spaces in the roof, or no roof at all, so that defenders could fire upon any attackers trapped inside. It often had its own doors, portcullis and drawbridge in addition to those in the main gatehouse.
Found on
https://www.encyclo.co.uk/local/20402
barbacan noun a tower that is part of a defensive structure (such as a castle)
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.