σίγμα
σίγμα or σῖγμα, the letter
A). sigma, v. Σς .
II). a <*> shaped portico, Princeton Exp.Inscr. III A No. 560 (v A.D.), JHS 28.195 (Aspendus, written σῖμμα).
2). Lat. sigma, crescent-shaped dining-table, , etc. 10.48.6