S: (n) angular distance (the angular separation between two objects as perceived by an observer) "he recorded angular distances between the stars"
S: (n) plane angle (an angle formed by two straight lines (in the same plane))
S: (n) spherical angle (an angle formed at the intersection of the arcs of two great circles)
S: (n) solid angle (an angle formed by three or more planes intersecting at a common point (the vertex))
S: (n) inclination, angle of inclination ((geometry) the angle formed by the x-axis and a given line (measured counterclockwise from the positive half of the x-axis))
S: (n) angle of reflection (the angle between a reflected ray and a line perpendicular to the reflecting surface at the point of incidence)
S: (n) angle of refraction (the angle between a refracted ray and a line perpendicular to the surface between the two media at the point of refraction)