e/Profile angle

Information
has gloss	eng: The profile angle of a gear is the angle at a specified pitch point between a line tangent to a tooth surface and the line normal to the pitch surface (which is a radial line of a pitch circle). This definition is applicable to every type of gear for which a pitch surface can be defined. The profile angle gives the direction of the tangent to a tooth profile.
lexicalization	eng: profile angle
instance of	(noun) a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion gear wheel, geared wheel, gear, cogwheel