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Wiktionary:Word of the day/2022/February 22

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Word of the day
for February 22
meridian n
  1. (astronomy)
    1. In full celestial meridian: a great circle passing through the poles of the celestial sphere and the zenith for a particular point on the Earth's surface.
    2. (also geography) In full terrestrial meridian: a great circle on the Earth's surface, passing through the geographic poles (the terrestrial North Pole and South Pole); also, half of such a circle extending from pole to pole, all points of which have the same longitude.
  2. (by extension)
    1. The place on the celestial meridian where it is crossed by the sun or a star at its highest point.
      1. (figuratively) The highest or most developed point, or most splendid stage, of something; culmination, peak, zenith.
      2. (figuratively, specifically) Chiefly followed by of: the middle period of someone's life, when they are at their full abilities or strength; one's prime.
    2. A ring or half-ring with markings in which an artificial globe is installed and may spin.
    3. (mathematics) A line passing through the poles of any sphere; a notional line on the surface of a curved or round body (in particular, an eyeball).
  3. (US, printing, dated) The size of type between double great primer and canon, standardized as 44-point.
  4. (obsolete)
    1. The south.
    2. Midday, noon.
    3. A midday rest; a siesta.
    4. A particular area or situation considered as having a specific characteristic or identity; also, the characteristics, habits, or tastes of a specific group, locale, etc.
    5. (Scotland) An alcoholic drink taken at midday.

[...]

  1. (acupuncture, traditional Chinese medicine) Any of the pathways on the body along which chi or qi (life force) is thought to flow and, therefore, the acupoints are distributed; especially, one of twelve such pathways associated with organs of the body.

meridian adj

  1. Relating to a meridian (in various senses); meridional.
  2. (archaic except literary) Relating to midday or noon.
  3. (obsolete)
    1. Relating to the culmination or highest point.
    2. Relating to the south; meridional, southern.

meridian v (rare, also figuratively)

  1. (transitive) To cause an object to reach the meridian or highest point of (something).
  2. (intransitive) Of a celestial body: to reach its meridian.
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