retrodirective
[ re-troh-di-rek-tiv, -dahy- ]
/ ˌrɛ troʊ dɪˈrɛk tɪv, -daɪ- /
adjective Optics.
(of a mirror, reflector, etc.) having three reflecting surfaces so oriented that a ray of light is reflected in a direction parallel but opposite to its original direction.
Words nearby retrodirective
retrocollic spasm,
retroconduction,
retrocursive,
retrocuspid papilla,
retrodeviation,
retrodirective,
retrodisplacement,
retrofire,
retrofit,
retroflex,
retroflexion