Dictionary entry

ὀκταήμερος

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

*† ὀκταήμερος, -ον

(< ὀκτώ, ἡμέρα),

of the eighth day, eight days old: c. dat. ref., περιτομῇ ὀ., Phl 3:5 (words of this class denote duration, cf. τεταρταῖος).†