from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The angle formed by a ray or wave incident on a surface and a line perpendicular to the surface at the point of incidence.
from the GNU version of the Collaborative International Dictionary of English.
- (Aëronautics) The angle between the chord of an aërocurve and the relative direction of the undisturbed air current.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun optics, physics The
anglethat a straight line, rayof light, etc., meeting a surface, makes with a normal to the surface at the pointof meeting.
- noun aeronautics The angle, usually fixed, between the
chordline of a wingor horizontal stabilizer and the axisof the fuselage, measured at the root. In UK called the angle of attack.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun the angle that a line makes with a line perpendicular to the surface at the point of incidence
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