Lewis & Short

in-gĕnĭcŭlus, a, um, adj. [in-geniculum], kneeling: Ingeniculus, sc. Hercules, a constellation: in extremis partibus oritur Ingeniculus, qui a Graeeis ἐν γόνασιν dicitur, Firm. Math. 8, 17: ingenicla (by sync. for ingenicula) imago, Manil. 5, 645; v. ‡ engonasi.