Definition of horizon

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Horizon (n.) A plane parallel to the sensible horizon of a place, and passing through the earth's center; -- called also rational / celestial horizon..

Lern More About Horizon

Purline :: Purline (n.) In root construction, a horizontal member supported on the principals and supporting the common rafters..
Steeve :: Steeve (v. t.) To elevate or fix at an angle with the horizon; -- said of the bowsprit, etc..
Cetacea :: Cetacea (n. pl.) An order of marine mammals, including the whales. Like ordinary mammals they breathe by means of lungs, and bring forth living young which they suckle for some time. The anterior limbs are changed to paddles; the tail flukes are horizontal. There are two living suborders:.
Barwise :: Barwise (adv.) Horizontally.
Sag :: Sag (v. i.) To sink, in the middle, by its weight or under applied pressure, below a horizontal line or plane; as, a line or cable supported by its ends sags, though tightly drawn; the floor of a room sags; hence, to lean, give way, or settle from a vertical position; as, a building may sag one way or another; a door sags on its hinges..
Feathering :: Feathering (n.) The act of turning the blade of the oar, as it rises from the water in rowing, from a vertical to a horizontal position. See To feather an oar, under Feather, v. t..
Amplitude :: Amplitude (n.) The arc of the horizon between the true east or west point and the center of the sun, or a star, at its rising or setting. At the rising, the amplitude is eastern or ortive: at the setting, it is western, occiduous, or occasive. It is also northern or southern, when north or south of the equator..
Upsun :: Upsun (n.) The time during which the sun is up, or above the horizon; the time between sunrise and sunset..
Summer :: Summer (n.) A large stone or beam placed horizontally on columns, piers, posts, or the like, serving for various uses. Specifically: (a) The lintel of a door or window. (b) The commencement of a cross vault. (c) A central floor timber, as a girder, or a piece reaching from a wall to a girder. Called also summertree..
Steeve :: Steeve (v. i.) To project upward, or make an angle with the horizon or with the line of a vessel's keel; -- said of the bowsprit, etc..
Level :: Level (n.) A horizontal line or plane; that is, a straight line or a plane which is tangent to a true level at a given point and hence parallel to the horizon at that point; -- this is the apparent level at the given point..
Ascendent :: Ascendent (a.) Rising toward the zenith; above the horizon.
Nadir :: Nadir (n.) That point of the heavens, or lower hemisphere, directly opposite the zenith; the inferior pole of the horizon; the point of the celestial sphere directly under the place where we stand..
Twilight :: Twilight (n.) The light perceived before the rising, and after the setting, of the sun, or when the sun is less than 18? below the horizon, occasioned by the illumination of the earth's atmosphere by the direct rays of the sun and their reflection on the earth..
Rising :: Rising (a.) Attaining a higher place; taking, or moving in, an upward direction; appearing above the horizon; ascending; as, the rising moon..
Arise :: Arise (v. i.) To come up from a lower to a higher position; to come above the horizon; to come up from one's bed or place of repose; to mount; to ascend; to rise; as, to arise from a kneeling posture; a cloud arose; the sun ariseth; he arose early in the morning..
Scamillus :: Scamillus (n.) A sort of second plinth or block, below the bases of Ionic and Corinthian columns, generally without moldings, and of smaller size horizontally than the pedestal..
Gnomon :: Gnomon (n.) A style or column erected perpendicularly to the horizon, formerly used in astronomocal observations. Its principal use was to find the altitude of the sun by measuring the length of its shadow..
Analemma :: Analemma (n.) An orthographic projection of the sphere on the plane of the meridian, the eye being supposed at an infinite distance, and in the east or west point of the horizon..
Steep-down :: Steep (n.) A precipitous place, hill, mountain, rock, or ascent; any elevated object sloping with a large angle to the plane of the horizon; a precipice..
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