Английский разговорный словарь (основной) - pentagon
Pentagon
pentagon
ˈpentəɡən n. 1 a plane figurewithfive sides and angles. 2 (the Pentagon) a the pentagonal Washington headquarters of the US defence forces. b the leaders of the US defence forces. øøpentagonal adj. [F pentagone or f. LL pentagonus f. Gk pentagonon (as PENTA-, -GON)]