ALTITUDE n.
The elevation of a point, or star, or other celestial object, above the horizon, measured by the arc of a vertical circle intercepted between such point and the horizon. It is either true or apparent; true when measured from the rational or real horizon, apparent when from the sensible or apparent horizon.…
ANGLE n.
angle, one formed by a right line falling on another perpendicularly, or an angle of 90º (measured by a quarter circle). -- Solid angle, the figure formed by the meeting of three or more plane angles at one point. -- Spherical angle, one made by the meeting of two arcs of great circles, which mutually cut one another…
CANICULAR a.
Pertaining to, or measured, by the rising of the Dog Star. Canicular days, the dog days, See Dog days. -- Canicular year, the Egyptian year, computed from one heliacal rising of the Dog Star to another.