na·dir /ˈneˌdɪr, ˈnedɚ/
天底,最底點,最低點
Na·dir n.
1. That point of the heavens, or lower hemisphere, directly opposite the zenith; the inferior pole of the horizon; the point of the celestial sphere directly under the place where we stand.
2. The lowest point; the time of greatest depression.
The seventh century is the nadir of the human mind in Europe. --Hallam.
Nadir of the sun Astron., the axis of the conical shadow projected by the earth.
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nadir
n 1: an extreme state of adversity; the lowest point of anything
[syn: low-water mark]
2: the point below the observer that is directly opposite the
zenith on the imaginary sphere against which celestial
bodies appear to be projected [ant: zenith]