Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The time that elapses between successive new moons, averaging 29 days, 12 hours, 44 minutes; a lunar month.

from The Century Dictionary.

  • noun The period of a synodic revolution of the moon, or the time from one new moon to the next.

from the GNU version of the Collaborative International Dictionary of English.

  • noun The period of a synodic revolution of the moon, or the time from one new moon to the next; varying in length, at different times, from about 291/4 to 295/6 days, the average length being 29 d., 12h., 44m., 2.9s.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun a month of approximately 29.53 days, measured from a lunar phase until the return of that same phase. On average, the number of days between Full Moons is about 29.5306 days. The actual number of days may differ from the average number by more than a half day. From one Full Moon to the next, the number of days in one lunation can vary between 29.272 and 29.833 days.
  • noun The irregular period from one new moon until the next.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the period between successive new moons (29.531 days)

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Middle English lunacioun, from Medieval Latin lūnātiō, lūnātiōn-, from Latin lūna; see lunar.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

from lunar

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Examples

  • This process is called lunation, and it is akin to the Moon bowing slightly as it dances around us, watching us all the while.

    Rambles at starchamber.com » Blog Archive » Nightmarish lunation 2005

  • As it had now been discovered that the exact length of the lunation is a little more than twenty-nine and a half days, it became necessary to abandon the alternate succession of full and deficient months; and, in order to preserve a more accurate correspondence between the civil month and the lunation, Meton divided the cycle into 125 full months of thirty days, and 110 deficient months of twenty-nine days each.

    Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" Various

  • (In fact, you may need to look at the free online manual just to understand terms like "lunation" and "Astronomical Julian date.")

    PC World 2009

  • (In fact, you may need to look at the free online manual just to understand terms like "lunation" and "Astronomical Julian date.")

    PC World 2009

  • (In fact, you may need to look at the free online manual just to understand terms like "lunation" and "Astronomical Julian date.")

    PC World 2009

  • A lunation trine to Uranus in your 5th house demands that you hurl yourself into the fray, grab the spotlight, and express yourself.

    November Horoscope Lutin, Michael 2007

  • Rambles at starchamber.com » Blog Archive » Nightmarish lunation

    Rambles at starchamber.com » Blog Archive » Nightmarish lunation 2005

  • And there is not the moon seen in all the lunation, save only the second quarter.

    The Travels of Sir John Mandeville 2004

  • On land, meridional, a bispherical moon, revealed in imperfect varying phases of lunation through the posterior interstice of the imperfectly occluded skirt of a carnose negligent perambulating female, a pillar of the cloud by day.

    Ulysses 2003

  • She had taken only four days to pass from syzygy to quadrature, and it was consequently evident that she would be visible for little more than a week at a time, and that her lunation would be accomplished within sixteen days.

    Off on a Comet 2003

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