trochlear UK /ˈtɹɒk.li.ə/US /ˈtɹɑk.li.ɚ/adjective 2noun 1forms 1 adjective2 •Shaped like, or resembling, a pulley; related to, or connected with, a trochlea. •Of or pertaining to the trochlear nerve. noun1 •A trochlear muscle or nerve.The two trochlears decussate in the anterior medullary velum. — 1949 formstrochlears