A nadir image is a satellite image or aerial photo of the Earth taken vertically. A satellite ground track represents its orbit projected to nadir on to Earth's surface.

The meaning of NADIR is the point of the celestial sphere that is directly opposite the zenith and vertically downward from the observer. How to use nadir in a sentence. Nadir Has Arabic Roots

NADIR definition: 1. the worst moment, or the moment of least hope and least achievement: 2. the point at which…. Learn more.

The nadir of something such as someone's career or the history of an organization is its worst time. This year was the nadir of his presidency. American English : nadir / ˈneɪdər /

If a highly forgetful person loses his phone, his wallet, and then his car keys in separate instances all in one day, you could say that he has reached an organizational nadir. This means “lowest point.”

nadir, a term used in astronomy for the point in the heavens exactly opposite to the zenith, the zenith and nadir being the two poles of the horizon. That is, the zenith is directly overhead, the nadir directly underfoot.

2025年3月19日 · Nadir is opposite the zenith. From Medieval Latin nadir, from Arabic نَظِير السَّمْت (naẓīr as-samt), composed of نَظِير (naẓīr, “counterpart, corresponding to”) and السَّمْت (as-samt, “the zenith”). nadir (plural nadirs) […] when we are Nadyr to the Sunne, we have no ſhadow […] […] the seventh century is the nadir of the human mind in Europe […]

Astronomy. the point on the celestial sphere directly beneath a given position or observer and diametrically opposite the zenith. Astrology. the point of a horoscope opposite the midheaven: …

The noun 'nadir,' denoting the lowest point or the bottom of something, has an intriguing etymology that originates from Arabic. It is derived from the Arabic term 'nāzir,' which means 'opposite' or 'contrary.'

Definition of nadir noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.