εἰκοσά-πρωτοι · eikosa-prōtoi — LSJ
municipal council of twenty, office of εἰ, hold such office
municipal council of twenty, OGI 629.10 (Palmyra), Rev.Ét.Gr. 6.120 (Iasos):—hence εἰκοσα-πρωτεία, ἡ, office of εἰ., Dig. 50.4.18.26, and εἰκοσα-πρωτεύω, hold such office, JHS 15.118 (Lycia), Jahresh. 5.199 (Arneae).