LSJ
(sc. φάρμακον), τό, a medicine for promoting a quick birth, Hp. Mul. 1.77, Steril. 224, Ar. Th. 504, Thphr. HP 9.9.3, Berl.Sitzb. 1934.1046 (pl.); — in Ar. the Rav. Ms. gives ὠκυτόκεἰ· τὸ ὠκυτόκειον προπαροξύνεται Hdn. Gr. 1.376; ὠκυτόκειον, ει δίφθογγος· καὶ γὰρ ὠκυτοκεύς Choerob. in An.Ox. 2.280; ὠκυτόκια is cited from Ar. by Poll. 2.7, cf. 4.208.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)