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3 definitions found
 for Lunar month
From The Collaborative International Dictionary of English v.0.48 :

  Lunar \Lu"nar\ (l[=u]"n[~e]r), a. [L. lunaris, fr. luna the
     moon. See Luna, and cf. Lunary.]
     1. Of or pertaining to the moon; as, lunar observations.
        [1913 Webster]
  
     2. Resembling the moon; orbed. --Dryden.
        [1913 Webster]
  
     3. Measured by the revolutions of the moon; as, a lunar
        month.
        [1913 Webster]
  
     4. Influenced by the moon, as in growth, character, or
        properties; as, lunar herbs. --Bacon.
        [1913 Webster]
  
     Lunar caustic (Med. Chem.), silver nitrate prepared to be
        used as a cautery; -- so named because silver was called
        luna by the ancient alchemists.
  
     Lunar cycle. Same as Metonic cycle. See under Cycle.
  
     Lunar distance, the angular distance of the moon from the
        sun, a star, or a planet, employed for determining
        longitude by the lunar method.
  
     Lunar method, the method of finding a ship's longitude by
        comparing the local time of taking (by means of a sextant
        or circle) a given lunar distance, with the Greenwich time
        corresponding to the same distance as ascertained from a
        nautical almanac, the difference of these times being the
        longitude.
  
     Lunar month. See Month.
  
     Lunar observation, an observation of a lunar distance by
        means of a sextant or circle, with the altitudes of the
        bodies, and the time, for the purpose of computing the
        longitude.
  
     Lunar tables.
        (a) (Astron.) Tables of the moon's motions, arranged for
            computing the moon's true place at any time past or
            future.
        (b) (Navigation) Tables for correcting an observed lunar
            distance on account of refraction and parallax.
  
     Lunar year, the period of twelve lunar months, or 354 days,
        8 hours, 48 minutes, and 34.38 seconds.
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Month \Month\ (m[u^]nth), n. [OE. month, moneth, AS.
     m[=o]n[eth], m[=o]na[eth]; akin to m[=o]na moon, and to D.
     maand month, G. monat, OHG. m[=a]n[=o]d, Icel. m[=a]nu[eth]r,
     m[=a]na[eth]r, Goth. m[=e]n[=o][thorn]s. [root]272. See
     Moon.]
     One of the twelve portions into which the year is divided;
     the twelfth part of a year, corresponding nearly to the
     length of a synodic revolution of the moon, -- whence the
     name. In popular use, a period of four weeks is often called
     a month.
     [1913 Webster]
  
     Note: In the common law, a month is a lunar month, or
           twenty-eight days, unless otherwise expressed.
           --Blackstone. In the United States the rule of the
           common law is generally changed, and a month is
           declared to mean a calendar month. --Cooley's
           Blackstone.
           [1913 Webster]
  
     A month mind.
     (a) A strong or abnormal desire. [Obs.] --Shak.
     (b) A celebration made in remembrance of a deceased person a
         month after death. --Strype.
  
     Calendar months, the months as adjusted in the common or
        Gregorian calendar; April, June, September, and November,
        containing 30 days, and the rest 31, except February,
        which, in common years, has 28, and in leap years 29.
  
     Lunar month, the period of one revolution of the moon,
        particularly a synodical revolution; but several kinds are
        distinguished, as the synodical month, or period from
        one new moon to the next, in mean length 29 d. 12 h. 44 m.
        2.87 s.; the nodical month, or time of revolution from
        one node to the same again, in length 27 d. 5 h. 5 m. 36
        s.; the sidereal, or time of revolution from a star to
        the same again, equal to 27 d. 7 h. 43 m. 11.5 s.; the
        anomalistic, or time of revolution from perigee to
        perigee again, in length 27 d. 13 h. 18 m. 37.4 s.; and
        the tropical, or time of passing from any point of the
        ecliptic to the same again, equal to 27 d. 7 h. 43 m. 4.7
        s.
  
     Solar month, the time in which the sun passes through one
        sign of the zodiac, in mean length 30 d. 10 h. 29 m. 4.1
        s.
        [1913 Webster]

From WordNet (r) 3.0 (2006) :

  lunar month
      n 1: the period between successive new moons (29.531 days) [syn:
           lunar month, moon, lunation, synodic month]

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