ovicystZool.|ˈəʊvɪsɪst| [irreg.f. ovi-1 + cyst; cf. oocyst.] A receptacle in which the ova are hatched in some ascidians. Hence oviˈcystica., pertaining to an ovicyst. 1877Huxley Anat.Inv.Anim. x. 622 The incubatory pouch may be termed the ovicyst.1890Cent.Dict., Ovicystic.