Definition of moon

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Moon (n.) The celestial orb which revolves round the earth; the satellite of the earth; a secondary planet, whose light, borrowed from the sun, is reflected to the earth, and serves to dispel the darkness of night. The diameter of the moon is 2,160 miles, its mean distance from the earth is 240,000 miles, and its mass is one eightieth that of the earth. See Lunar month, under Month..

Lern More About Moon

Gibbous :: Gibbous (a.) Swelling by a regular curve or surface; protuberant; convex; as, the moon is gibbous between the half-moon and the full moon..
Dracontic :: Dracontic (a.) Belonging to that space of time in which the moon performs one revolution, from ascending node to ascending node. See Dragon's head, under Dragon..
Horsehead :: Horsehead (n.) The silver moonfish (Selene vomer).
Moonwort :: Moonwort (n.) Any fern of the genus Botrychium, esp. B. Lunaria; -- so named from the crescent-shaped segments of its frond..
Moonblink :: Moonblink (n.) A temporary blindness, or impairment of sight, said to be caused by sleeping in the moonlight; -- sometimes called nyctalopia..
Nyctalopia :: Nyctalopia (n.) See Moonblink.
Revolution :: Revolution (n.) The motion of any body, as a planet or satellite, in a curved line or orbit, until it returns to the same point again, or to a point relatively the same; -- designated as the annual, anomalistic, nodical, sidereal, or tropical revolution, according as the point of return or completion has a fixed relation to the year, the anomaly, the nodes, the stars, or the tropics; as, the revolution of the earth about the sun; the revolution of the moon about the earth..
Medialuna :: Medialuna (n.) See Half-moon.
Honesty :: Honesty (a.) Satin flower; the name of two cruciferous herbs having large flat pods, the round shining partitions of which are more beautiful than the blossom; -- called also lunary and moonwort. Lunaria biennis is common honesty; L. rediva is perennial honesty..
Luna :: Luna (n.) The moon.
Terminator :: Terminator (n.) The dividing line between the illuminated and the unilluminated part of the moon.
Eclipse :: Eclipse (n.) An interception or obscuration of the light of the sun, moon, or other luminous body, by the intervention of some other body, either between it and the eye, or between the luminous body and that illuminated by it. A lunar eclipse is caused by the moon passing through the earth's shadow; a solar eclipse, by the moon coming between the sun and the observer. A satellite is eclipsed by entering the shadow of its primary. The obscuration of a planet or star by the moon or a planet, thoug
Half-moon :: Half-moon (n.) An outwork composed of two faces, forming a salient angle whose gorge resembles a half-moon; -- now called a ravelin..
Lunistice :: Lunistice (n.) The farthest point of the moon's northing and southing, in its monthly revolution..
Change :: Change (v. i.) To pass from one phase to another; as, the moon changes to-morrow night..
Half-moon :: Half-moon (n.) A marine, sparoid, food fish of California (Caesiosoma Californiense). The body is ovate, blackish above, blue or gray below. Called also medialuna..
Moonfish :: Moonfish (n.) The mola. See Sunfish, 1..
Moonsail :: Moonsail (n.) A sail sometimes carried in light winds, above a skysail..
Phase :: Phase (n.) A particular appearance or state in a regularly recurring cycle of changes with respect to quantity of illumination or form of enlightened disk; as, the phases of the moon or planets. See Illust. under Moon..
Appulse :: Appulse (n.) The near approach of one heavenly body to another, or to the meridian; a coming into conjunction; as, the appulse of the moon to a star, or of a star to the meridian..
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