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Lunar month   /lˈunər mənθ/   Listen
noun
Month  n.  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. Note: In the common law, a month is a lunar month, or twenty-eight days, unless otherwise expressed. In the United States the rule of the common law is generally changed, and a month is declared to mean a calendar month.
A month mind.
(a)
A strong or abnormal desire. (Obs.)
(b)
A celebration made in remembrance of a deceased person a month after death.
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.


adjective
Lunar  adj.  
1.
Of or pertaining to the moon; as, lunar observations.
2.
Resembling the moon; orbed.
3.
Measured by the revolutions of the moon; as, a lunar month.
4.
Influenced by the moon, as in growth, character, or properties; as, lunar herbs.
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.





Collaborative International Dictionary of English 0.48


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"Lunar month" Quotes from Famous Books



... every woman considers herself competent to make the answer—nine months. She may be surprised to learn, however, that such an answer is wanting in scientific precision. It is too indefinite, and is erroneous. There is a great difference between the calendar and the lunar month. Each lunar month having twenty-eight days, the period of nine lunar months is two hundred and fifty-two days. Nine calendar months, including February, represent, on the contrary, two hundred and seventy-three days. Now the average duration of pregnancy ...
— The Physical Life of Woman: - Advice to the Maiden, Wife and Mother • Dr. George H Napheys
... represented by a globe in the centre, the sun by a disc which travels round it once in twenty-four hours, showing the time of day; the moon by a globe so fastened to a blue disc that it revolves once during a lunar month; half of this is painted black, the other half is gilt, and the age of the moon is indicated by the amount of the gilded portion visible—when the moon is full the whole of the gilt hemisphere is shown, when new the whole of the black. This clock still ...
— Bell's Cathedrals: Wimborne Minster and Christchurch Priory • Thomas Perkins
... or nearly two and a half of her own years, constituting what is called her synodic period of apparent revolution as seen from this globe. She thus presents to us all the phases undergone by our own satellite during a lunar month, passing from new to full, and vice versa, through the various intervening ...
— Young Folks' Library, Volume XI (of 20) - Wonders of Earth, Sea and Sky • Various
... fall of our tides twice a day, with spring and neap tides twice in the lunar month, are the effect of the combined action of the sun and moon, is never called in question. The water under the moon is drawn up from the earth, and the earth is drawn from the water on the opposite side, the consequence of which is two high tides in the two hemispheres at the same hour. The rotation ...
— Moon Lore • Timothy Harley
... knots in a string to fix the date of a wedding the wedding must take place in the lunar month in which the knots are tied or else the children born ...
— Folklore of the Santal Parganas • Cecil Henry Bompas


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