2. γόνος ἄ. no longer a son, of a horse that mounts his dam, Opp.C.1.260.
II. Act., unfruitful, sterile, of animals both male and female, Hp.Aph.5.59, Art.41 (Comp.), Arist. GA726a3 (Comp.), etc.; “γαστήρ” Ael.NA15.9; τόκοισι ἀ. travail withoutissue, bringing no children to the birth, S.OT 27: metaph., “ἄ. ποιητής” Plu.2.348b.
b. of flowers, sterile, or seeds, infertile, Thphr.HP1.13.4, 1.11.1; ὁμίχλη νεφέλη ἄ., i. e. not producing water, Arist.Mete.346b35, cf. Ar.DId.p.451.33D.
c. metaph., ἄ. ἡμέρα, ἔτος a day or year unlucky for begetting children, Hp. Epid.2.6.8 and 10 (of odd days and years); “τὸ ἄ. τῆς ὕλης” Plot.3.6.19, cf.6.3.8.
d. Astrol., impedinggeneration, ζᾥδιον Vett. Val.10.11.