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

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


(Units) another name for synodic month See month6


(luˈneɪ ʃən)

the period of time from one new moon to the next (about 29½ days).
[1350–1400; Middle English < Medieval Latin lūnātiō]


the period of the moon’s synodic revolution, from the time of the new moon to the next new moon; one lunar month or approximately 29 1/2 days.
See also: Calendar
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.lunation - the period between successive new moons (29.531 days)
lunar year - a period of 12 lunar months
month - a time unit of approximately 30 days; "he was given a month to pay the bill"
References in periodicals archive ?
Each month lasts for a full lunation, which is the time span from one mew moon to the next.
Mission plans facilitated long-term planning for early phases of the mission and for each month-long lunation of the science phase.
I have been unable to find any information about this Somniale text specifically, but DiTommaso has generously provided me with a reference to a Latin lunation in a manuscript in the Conrady collection.
25 PER MIN PISCES FEBRUARY 20 – MARCH 20 Full Moon turns tides, changing weather patterns and Tuesday's lovely lunation marks a shift around family matters and domestic affairs.
37) He showed by analysis of the intensity estimates by himself and five other members of the Circle that these patches--although curious in appearance to the observer--varied systematically in brightness during each lunation.
Science and the Lunation Cycle", Matrix Journal, 1990
Criteria such as these, when calculated on the globe for each lunation, generate lunar date line curves that divide the globe into positive prediction and negative prediction zones.
In African star lore lunation was used as a celestial analogy for the cycle of life in that the moon is seen to be born, to grow, to decay and die as it passes through its waxing and waning phases.
For instance, a longer than normal lunation tends to occur between October and March because of the faster movement by the Earth in its orbit round the sun.
The first of these is the biggest part of New Atlas of the Moon and consists of a series of two-page spreads that show lunar phases for nearly a full lunation, from day 3 to day 27.
9:35:40 on a Wednesday), but the first new moon did not occur until the moon and the sun had been created six lunation periods later on Molad Tishri of Jewish calendar year 2 at exactly 8:00:00 am on Friday (i.
Meditations of evolution increasingly vaster: of the moon invisible in incipient lunation, approaching perigee of the infinite lattiginous scintillating uncondensed milky way, discernible by daylight by an observer placed at the lower end of a cylindrical vertical shaft 5000 ft deep sunk from the surface towards the centre of the earth .