τετράπυλον

ον, Adj., τό
A. archway entered from four sides, OGI 722.6 (Egypt, iv A.D.); = quadrivium, Gloss.: Adj. τετρά‐πυλος, ον, with four gateways, περίβολος πόλεως Str. 12.4.7.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project