lunisolar precession

2 definitions found

lunisolar precession - Collaborative International Dictionary of English v.0.48 :

  Precession \Pre*ces"sion\, n. [L. praecedere, praecessum, to go
     before: cf. F. pr['e]cession. See Precede.]
     The act of going before, or forward.
     [1913 Webster]
  
     Lunisolar precession. (Astron.) See under Lunisolar.
  
     Planetary precession, that part of the precession of the
        equinoxes which depends on the action of the planets
        alone.
  
     Precession of the equinoxes (Astron.), the slow backward
        motion of the equinoctial points along the ecliptic, at
        the rate of 50.2[sec] annually, caused by the action of
        the sun, moon, and planets, upon the protuberant matter
        about the earth's equator, in connection with its diurnal
        rotation; -- so called because either equinox, owing to
        its westerly motion, comes to the meridian sooner each day
        than the point it would have occupied without the motion
        of precession, and thus precedes that point continually
        with reference to the time of transit and motion.
        [1913 Webster]

  Lunisolar \Lu"ni*so"lar\, a. [L. luna moon + E. solar: cf. F.
     lunisolaire.]
     Resulting from the united action, or pertaining to the mutual
     relations, of the sun and moon.
     [1913 Webster]
  
     Lunisolar precession (Astron.), that portion of the annual
        precession of the equinoxes which depends on the joint
        action of the sun and moon.
  
     Lunisolar year, a period of time, at the end of which, in
        the Julian calendar, the new and full moons and the
        eclipses recur on the same days of the week and month and
        year as in the previous period. It consists of 532 common
        years, being the least common multiple of the numbers of
        years in the cycle of the sun and the cycle of the moon.
        [1913 Webster]