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(loo-nay -shŏn) See synodic month.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006


(religion, spiritualism, and occult)

A lunation is a complete cycle between two new moons, also referred to as a synodic month. Lunations average 29 days, 12 hours, 44 minutes, and 2.7 seconds. The term “lunation” can also be used interchangeably with “new moon.”

The Astrology Book, Second Edition © 2003 Visible Ink Press®. All rights reserved.


The time period between two successive new moons.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

synodic month

synodic month
synodic monthclick for a larger image
The average period of revolution of the moon about the earth with respect to the sun, a period of 29 days 12 h 44 min 2.8 s. This is sometimes called the month of the phases, because it extends from the new moon to the next new moon. Also called lunation.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
William Berchot was personally examined by the escheator, who finds he is 'manifestly an idiot, and has been so from his birth, nor does he enjoy lucid intervals, but, as he has heard, at lunations is worse and raves with madness'.
B: 13 average lunation periods = 54 weeks + 5d 21:32:43 1/3
However, the "average" lunation is based not on observation but on the unseen, theoretical conjunction of sun, moon, and earth; it is easily calculable (by tracking lunar eclipses), which is part of why it eventually supplanted the observance of the new crescent in the Jewish calendar.
It is an alien model which exhibits a useful correlation between lunations, phases of horticultural activity and Gregorian calendar months--but it is based on a comparison that does not arise in Torres people's minds.
Today's powerful lunation can be a call to make that decision.
The same phenomenon regarding these two craters had been noted also at a previous lunation. Stevinus seems particularly adapted to this observation, although other craters also show it.
For example, near the end of the novel, in the early-morning hours of June 17, 1904, Bloom describes the "moon invisible in incipient lunation, approaching perigee" (Chapter 17).
If yesterday's potent lunation encouraged productive dialogue on this very subject, this is certainly something to be welcomed Cancer.
We've recently installed a new CCD camera enabling us to image the entire observable sky from Flagstaff each lunation. To date [2000 May], the LONEOS project has discovered 33 near-Earth asteroids and 8 comets.
One lunation later, on March 18th at 10:35 UT, it goes 4.6[degrees] north.
Sagittarius Nov 23 Dec 21 The lunation in your sector of dreams and wishes can inspire you to think carefully about whether certain desires are worth aiming for or not.
The scene is moody and atmospheric and provides a significant insight into the thought, values and philosophy of the observer --his feelings wrapped up in the bland yet vibrant comment, 'a long awaited opportunity under reasonable conditions.' (22) Although this sequence takes place each lunation, observing it from the Earth is indeed a challenging assignment dependent on a number of factors, such as the exact position of the terminator, the Moon's declination, libration, local weather and the quality of seeing and so on.