What is meant by the term nadir?

Nadir: The lowest point. The nadir may refer, for example, to the lowest blood count after chemotherapy or the lowest concentration of a drug in the body.

What is nadir depth?

/ (ˈneɪdɪə, ˈnæ-) / noun. the point on the celestial sphere directly below an observer and diametrically opposite the zenith. the lowest or deepest point; depthsthe nadir of despair.

What is a zenith and nadir?

Definition: Zenith is the imaginary point that is directly above a particular location on the celestial sphere. The opposite of zenith, that is the direction of the gravitational pull, is called the Nadir, at 180 degrees. Zenith, in astronomy terms, is the point in the sky directly overhead.

What does nadir mean in business?

In business, a nadir would be the point at which a company has lost so much money that it must close its doors or make drastic changes in order to continue doing business.

How is nadir calculated?

Nadir is calculated by determining the smallest sum which occurred prior to that visit and is retained until a smaller value takes its place. Using a RETAIN statement, the previously selected value can be carried vertically downward, populating the subsequent data rows for each subject.

What are nadir images?

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.

Why is it called nadir?

Nadir derives from an Arabic word meaning “opposite”—the opposite, that is, of the zenith, or the highest point of the celestial sphere, the one vertically above the observer.

How long does nadir last after chemo?

The nadir time is usually about 10 days after treatment, although this may vary depending on the drugs given.

How do I find my zenith?

Zenith, point on the celestial sphere directly above an observer on the Earth. The point 180° opposite the zenith, directly underfoot, is the nadir. Astronomical zenith is defined by gravity; i.e., by sighting up a plumb line.

What is meant by nadir 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.

What is the nadir period?

The period from 1890-1920, is often called the “nadir” of African American history, yet African Americans kept hope alive and forged new political weapons during this time. It may be helpful to think of southerners in 1890 as the baby boomers of the nineteenth century.

What does nadir feel like?

This is called the nadir (pronounced nah-deer). You might feel very tired. Some people also feel depressed at this time. After the nadir, the level of white blood cells gradually goes up until it is almost back to normal.

What does Nadir stand for in medical category?

In oncology, the term nadir is used to represent the lowest level of a blood cell count while a patient is undergoing chemotherapy.

Who is the first person to use the word Nadir?

(The word zenith itself is a modification of another Arabic word that means “the way over one’s head.”) The English poet John Donne is first on record as having used nadir in the figurative sense of “lowest point” in a sermon he wrote in 1627. Nantucket reached its nadir in the post-Civil War period.

What does Nadir mean in relation to the Sun?

The term nadir can also be used to represent the lowest point reached by a celestial body during its apparent orbit around a given point of observation. This can be used to describe the location of the Sun, but it is only technically accurate for one latitude at a time and only possible at the low latitudes.

Which is better, the time from Padt to Nadir?

Nadir PSA and time from PADT to nadir were factors that affect both CRPC and overall survival in a cohort of patients with metastatic prostate cancer. Lower nadir PSA level and longer time from PADT to nadir were good for survival and progression.