The point below the observer that is directly opposite the zenith on the imaginary sphere against which celestial bodies appear to be projected an extreme state of adversity; the lowest point of anything.
The lowest point; the time of greatest depression.
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.
The point directly underneath.
The point on the ground vertically beneath the satellite.
The point on any given observer's celestial sphere diametrically opposite of one's zenith.
The lowest point of the celestial sphere; opposite to zenith.
That point on the celestial sphere vertically below the observer, or 180 degrees from the zenith.
Point on the ground vertically beneath the center of a remote sensing platform.
The point on the ground vertically beneath the centre of a remote sensing system.
That point on the celestial sphere directly opposite the zenith and directly below the observer The lowest point.
The nadir is that part of the celestial sphere that is directly below the observer For a transit or theodolite, it is the point directly below the vertical axis of the instrument.
The point on the celestial sphere 180o from the zenith.
The lowest measured value In cancer treatments, it usually refers to the lowest white blood cell and platelet count.
The point on the celestial sphere 180 degrees from the zenith.
An extreme state of adversity; the lowest point of anything.
Term used to describe a point directly underneath an object or body.
Point on Earth directly beneath a satellite, the opposite of zenith Compare with subsatellite point.
The point on the celestial sphere opposite the zenith or directly below the observer.
An imaginary point directly under an observer on the surface of the Earth, extending through the Earth and into the sky.
Straight down, usually used for reference in the output of a downward-facing luminaire.
The lowest point Refers to the lowest blood glucose concentration on a bg curve.
The direction toward the center of the Earth or other body.
Few and far between.
The point below the observer that is directly opposite the zenith on the imaginary sphere against which celestial bodies appear to be projected.