The point of the celestial sphere, directly opposite the zenith; inferior pole of the horizon; point of the celestial sphere directly under the place of observation.
The lowest point; time of greatest depression.
The axis of a projected conical shadow; the direction of the force of gravity at a location; down.
To extend (a beehive) by adding an empty box at the base.
The point in the elliptical orbit of a comet, planet, etc., where it is nearest to the Sun.
The highest point or state; the peak, zenith.