Origin: 1250–1300; Middle English barbecan, barbican < Old French barbacane or Medieval Latin barbacana, perhaps ≪ Persian bālāḥāna terrace over a roof, upper floor, altered by association with Latin barbabeard, a beard marking the front or face of a thing
a walled outwork or tower to protect a gate or drawbridge of a fortification
2.
a watchtower projecting from a fortification
[C13: from Old French barbacane, from Medieval Latin barbacana, of unknown origin]
Barbican (ˈbɑːbɪkən)
—n
the Barbican a building complex in the City of London: includes residential developments and the Barbican Arts Centre (completed 1982) housing concert and exhibition halls, theatres, cinemas, etc
"outer fortification of a city or castle," c.1300, from O.Fr. barbacane (12c.), a general Romanic word, perhaps ultimately from Arabic or Persian (cf. bab-khanah "gate-house").