σύσσιτος

A. messmate, Thgn. 309, Hdt. 5.24, Ar. V. 557 (anap.), Ra. 1075 (anap.), Pl. 602 (anap.), Pl. Lg. 806e (ξυσσιτίων codd.), X. Cyr. 8.7.14, Arist. Pol. 1314a10; member of common-room of the Museum at Alexandria, OGI 712 (ii A.D.).
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project