σίγμα
From LSJ
ἑτέρως ἠδύνατο βέλτιον ἢ ὡς νῦν ἔχει κατεσκευάσθαι → otherwise they could have been constructed better than they are now (Galen, On the use of parts of the body 4.143.1 Kühn)
English (LSJ)
or σῖγμα, the letter
A sigma, v. Σς. II a <*> shaped portico, Princeton Exp.Inscr. III A No.560 (v A.D.), JHS28.195 (Aspendus, written σῖμμα). 2 Lat. sigma, crescent-shaped dining-table, Mart. 10.48.6, etc.
