retrodeviation ret·ro·de·vi·a·tion (rět’rō-dē’vē-ā’shən)
A backward bending or inclining.
[re-troh-di-rek-tiv, -dahy-] /ˌrɛ troʊ dɪˈrɛk tɪv, -daɪ-/ adjective, Optics. 1. (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.
retrodisplacement ret·ro·dis·place·ment (rět’rō-dĭs-plās’mənt) n. A backward displacement, such as retroflexion.
verb (used with object) 1. to draw back or in: to retract fangs. verb (used without object) 2. to draw back within itself or oneself, fold up, or the like, or to be capable of doing this: The blade retracts. verb (used with object) 1. to withdraw (a statement, opinion, etc.) as inaccurate or unjustified, […]
noun 1. a structure consisting of a pair of parallel lines of rails with their crossties, on which a railroad train, trolley, or the like runs. 2. a wheel rut. 3. evidence, as a mark or a series of marks, that something has passed. 4. Usually, tracks. footprints or other marks left by an animal, […]