nadir

The definition of a nadir is the lowest point.

(noun)

An example of nadir is the Great Depression.

See nadir in Webster's New World College Dictionary

noun

that point of the celestial sphere directly opposite to the zenith and directly below the observer
the lowest point

Origin: ME < MFr < ML < Ar naẓīr, in naẓīr as-samt, lit., opposite to the zenith < naẓīr, opposite + as-samt, zenith

See nadir in American Heritage Dictionary 4

noun

Astronomy A point on the celestial sphere directly below the observer, diametrically opposite the zenith.
The lowest point: the nadir of their fortunes.

Origin:

Origin: Middle English

Origin: , from Medieval Latin

Origin: , from Arabic nażīr (as-samt), opposite (the zenith)

Origin: , from nażara, to see, watch; see nị̄r in Semitic roots

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