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WordReference Random House Unabridged Dictionary of American English © 2024an′gle of in′cidence, - Optics, Physics, OpticsAlso called incidence. the angle that a straight line, ray of light, etc., meeting a surface, makes with a normal to the surface at the point of meeting.
- Aeronautics(on an airplane) the angle, usually fixed, between a wing or tail root chord and the axis of the fuselage.
- [Chiefly Brit.]See angle of attack (def. 1).
Collins Concise English Dictionary © HarperCollins Publishers:: angle of incidence n - the angle that a line or beam of radiation makes with the normal to the surface at the point of incidence
- Also called: rigging angle of incidence the angle between the chord line of an aircraft wing or tailplane and the aircraft's longitudinal axis
an′gle of attack′, - AeronauticsAlso called,[esp. Brit.,] angle of incidence. the acute angle between the chord of an aircraft wing or other airfoil and the direction of the relative wind.
- Rail Transportthe angular attitude of a wheel flange to the rail, esp. on curves.
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