ὀκτωκαιδέκᾰτ-ος, η, ον,
eighteenth, -δεκάτη (i.e. ἡμέρᾳ) on the eighteenth day, [[ 8th c.BC: Odyssea Homerus Epicus “Odyssey” 5.279, 24.65; ἔτος 2nd c.BC: Polybius Historicus 1.56.2, etc. ] Refs 8th c.BC+]; Boeotian dialect ὀκτοκηδέκατος [[ “Schwyzer” 485.39 (Thespiae, 3rd c.BC). ] Refs 3rd c.BC+]