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The meridian system ( simplified Chinese: 经络; traditional Chinese: 經絡; pinyin: jīngluò, also called channel network) is a pseudoscientific concept from traditional Chinese medicine (TCM) that alleges meridians are paths through which the life-energy known as "qi" ( ch'i) flows. [ 1]
Some acupuncture points have several traditional names, for example tài yuān ( 太渊) and gui xin ( 鬼心) are two names used for the 9th acupuncture point on the lung meridian. [citation needed] The World Health Organization (WHO) published A Proposed Standard International Acupuncture Nomenclature Report in 1991 and 2014, listing 361 ...
Meridian (astronomy) The meridian on the celestial sphere. An observer's upper meridian, a semicircle contains their zenith and both celestial poles; the observer's local meridian is the semicircle that passes through their zenith and the north and south points of their horizon. In astronomy, the meridian is the great circle passing through the ...
The graticule shows the latitude and longitude of points on the surface. In this example meridians are spaced at 6° intervals and parallels at 4° intervals. In geography, latitude is a coordinate that specifies the north–south position of a point on the surface of the Earth or another celestial body.
Longitude ( / ˈlɒndʒɪtjuːd /, AU and UK also / ˈlɒŋɡɪ -/) [ 1][ 2] is a geographic coordinate that specifies the east – west position of a point on the surface of the Earth, or another celestial body. It is an angular measurement, usually expressed in degrees and denoted by the Greek letter lambda (λ). Meridians are imaginary ...
Zenith. The zenith ( UK: / ˈzɛnɪθ /, US: / ˈziːnɪθ /) [ 1] is the imaginary point on the celestial sphere directly "above" a particular location. "Above" means in the vertical direction ( plumb line) opposite to the gravity direction at that location ( nadir ). The zenith is the "highest" point on the celestial sphere.
The central meridian is the meridian going through the sub-Earth point. [2] Because of the body's rotation and orbital alignment with the observer the central meridian changes with time, as it is based on the observer's point of view. For example, consider the Earth as seen from the Moon. There will be a meridian going through the centre of the ...
A prime meridian is an arbitrarily -chosen meridian (a line of longitude) in a geographic coordinate system at which longitude is defined to be 0°. Together, a prime meridian and its anti-meridian (the 180th meridian in a 360°-system) form a great circle. This great circle divides a spheroid, like Earth, into two hemispheres: the Eastern ...