LSJ
or προαισιμνάω, to be chairman of a board of αἰσυμνᾶται (αἰσιμν-), IPE 1². 352.57 (Chersonesus, ii BC), SIG 1011.10 (Chalcedon, iii/ii BC); — Pass., of acts done by such a chairman, ib. 12.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)