angle of attack(n = noun.shape) - the acute angle between the direction of the undisturbed relative wind and the chord of an airfoil;
is a kind of angle of incidence, incidence angle

acute angle, air attack, angle, angle bracket, angle for, angle iron, angle of dip, angle of entry, angle of extinction, angle of incidence, angle of inclination, angle of reflection, angle of refraction, angle of view, anxiety attack, asthma attack, attack, attack aircraft, attack aircraft carrier, attack dog, attack submarine, banzai attack, biologic attack, biological attack, camera angle, critical angle, cutting angle, diversionary attack, exterior angle, external angle, extinction angle, face angle, gliding angle, ground attack, heart attack, helix angle, hour angle, incidence angle, interior angle, internal angle, joint direct attack munition, oblique angle, obtuse angle, panic attack, phase angle, plan of attack, plane angle, polyhedral angle, preventive attack, reentering angle, reentrant angle, reflex angle, right angle, round angle, salient angle, solid angle, spherical angle, straight angle, surprise attack, terrorist attack, tilt angle, transient ischemic attack, under attack, vertical angle, view angle, warning of attack, wave angle