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nadir
/neɪˈdɪə(ɹ)/
noun
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.
Similar: bathos, lowest ebb, slough of despond, trough
The axis of a projected conical shadow; the direction of the force of gravity at a location; down.
"The nadir of the sun is the axis of the shadow projected by the Earth."
Similar: down
verb
To extend (a beehive) by adding an empty box at the base.
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