δεκάμηνος

ον, Adv., τό
A. ten months old, σκύλαξ X. Cyn. 7.6, cf. Theoc. 24.1.
2. in the tenth month, ἡ αἵρεσις ἐγένετο ἔς τι δ. Hdt. 9.3; τὰ δ. (sc. παιδία) Hp. Septim. 7; γυνὴ κυεῖ δ. prob. l. in Men. 413; τόκος δ. Arist. GA 777b14: neut. pl. as Adv., ib.772b9.
3. consisting of ten months, ἡ δ. (sc. περίοδος) Placit. 5.18.1: Subst. δεκάμηνον,τό, Schwyzer 195.12 (Delos, ii B.C.), PRyl. 88.17 (ii A.D.).
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project