ˈsɜːk.jə.lə(ɹ) ˈsɝk.jə.lɚ ɔː.bɪt.əl ɔɹ.bət.l̩ ˈɹoʊtəɹi describing a circle; moving in a circle the circular motion of the wheel of or relating to the eye socket orbital scale orbital arch of or relating to an orbit orbital revolution orbital velocity