Definition of reflectional in English:
reflectional
(also reflexional)
adjective rɪˈflɛkʃ(ə)n(ə)lrɪˈflɛkʃən(ə)l
Of or relating to reflection; involving reflection.
Origin
Mid 19th century; earliest use found in Johann Stallo (1823–1900). From reflection + -al.