τρίτατος

η, ον
A. like μέσσατος for μέσος, Il. 1.252, 14.117, E. Hipp. 135 (lyr.), A.R. 1.53; τριτάτην, abs., in the third place, IG 4.682.14 (Hermione: so Boeckh; τρίτατ’ ἦν Fraenkel).
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project