Adjacent Words

Declination definitions

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Webster's 1828 Dictionary

DECLINA'TION, n.
1. A leaning; the act of bending down; as a declination of the head.
2. A declining, or falling into a worse state; change from a better to a worse condition; decay; deterioration; gradual failure or diminution of strength, soundness, vigor or excellence.
3. A deviation from a right line, in a literal sense; oblique motion; as the declination of a descending body.
4. Deviation from rectitude in behavior or morals; obliquity of conduct; as a declination from the path of integrity.
5. In astronomy, a variation from a fixed point or line. The distance of any celestial object from the equinoctial line, or equator, either northward or southward.
6. Declination of the compass or needle, is the variation of the needle from the true meridian of a place.
7. In dialing, the declination of a wall or plane, is an arch of the horizon, contained between the plane and the prime vertical circle, if reckoned from the east or west, or between the meridian and the plane, if you reckon from the north or south.
8. In grammar, declension; or the inflection of a noun through its various terminations.

WordNet (r) 3.0 (2005)

n
1: a condition inferior to an earlier condition; a gradual falling off from a better state [syn: decline, declination] [ant: improvement, melioration]
2: a downward slope or bend [syn: descent, declivity, fall, decline, declination, declension, downslope] [ant: acclivity, ascent, climb, raise, rise, upgrade]
3: (astronomy) the angular distance of a celestial body north or to the south of the celestial equator; expressed in degrees; used with right ascension to specify positions on the celestial sphere [syn: declination, celestial latitude, dec]
4: a polite refusal of an invitation [syn: declination, regrets]

Merriam Webster's

noun Etymology: Middle English declinacioun, from Middle French declination, from Latin declination-, declinatio angle of the heavens, turning aside Date: 14th century 1. angular distance north or south from the celestial equator measured along a great circle passing through the celestial poles 2. a turning aside or swerving 3. deterioration <moral declination> 4. a bending downward ; inclination 5. a formal refusal 6. the angle formed between a magnetic needle and the geographical meridian • declinational adjective

U.S. Military Dictionary

(*) The angular distance to a body on the celestial sphere measured north or south through 90 degrees from the celestial equator along the hour circle of the body. Comparable to latitude on the terrestrial sphere. See also magnetic declination; magnetic variation.

Oxford Reference Dictionary

n. 1 a downward bend or turn. 2 Astron. the angular distance of a star etc. north or south of the celestial equator. 3 Physics the angular deviation of a compass needle from true north. 4 US a formal refusal. Derivatives: declinational adj. Etymology: ME f. L declinatio (as DECLINE)

Webster's 1913 Dictionary

Declination Dec`li*na"tion, n. [L. declinatio a bending aside, an avoiding: cf. F. d['e]clination a decadence. See Declension.] 1. The act or state of bending downward; inclination; as, declination of the head. 2. The act or state of falling off or declining from excellence or perfection; deterioration; decay; decline. ``The declination of monarchy.'' --Bacon. Summer . . . is not looked on as a time Of declination or decay. --Waller. 3. The act of deviating or turning aside; oblique motion; obliquity; withdrawal. The declination of atoms in their descent. --Bentley. Every declination and violation of the rules. --South. 4. The act or state of declining or refusing; withdrawal; refusal; averseness. The queen's declination from marriage. --Stow. 5. (Astron.) The angular distance of any object from the celestial equator, either northward or southward. 6. (Dialing) The arc of the horizon, contained between the vertical plane and the prime vertical circle, if reckoned from the east or west, or between the meridian and the plane, reckoned from the north or south. 7. (Gram.) The act of inflecting a word; declension. See Decline, v. t., 4. Angle of declination, the angle made by a descending line, or plane, with a horizontal plane. Circle of declination, a circle parallel to the celestial equator. Declination compass (Physics), a compass arranged for finding the declination of the magnetic needle. Declination of the compass or needle, the horizontal angle which the magnetic needle makes with the true north-and-south line.

Webster's 1913 Dictionary

Refraction Re*frac"tion (r?*fr?k"sh?n), n. [F. r['e]fraction.] 1. The act of refracting, or the state of being refracted. 2. The change in the direction of ray of light, heat, or the like, when it enters obliquely a medium of a different density from that through which it has previously moved. Refraction out of the rarer medium into the denser, is made towards the perpendicular. --Sir I. Newton. 3. (Astron.) (a) The change in the direction of a ray of light, and, consequently, in the apparent position of a heavenly body from which it emanates, arising from its passage through the earth's atmosphere; -- hence distinguished as atmospheric refraction, or astronomical refraction. (b) The correction which is to be deducted from the apparent altitude of a heavenly body on account of atmospheric refraction, in order to obtain the true altitude. Angle of refraction (Opt.), the angle which a refracted ray makes with the perpendicular to the surface separating the two media traversed by the ray. Conical refraction (Opt.), the refraction of a ray of light into an infinite number of rays, forming a hollow cone. This occurs when a ray of light is passed through crystals of some substances, under certain circumstances. Conical refraction is of two kinds; external conical refraction, in which the ray issues from the crystal in the form of a cone, the vertex of which is at the point of emergence; and internal conical refraction, in which the ray is changed into the form of a cone on entering the crystal, from which it issues in the form of a hollow cylinder. This singular phenomenon was first discovered by Sir W. R. Hamilton by mathematical reasoning alone, unaided by experiment. Differential refraction (Astron.), the change of the apparent place of one object relative to a second object near it, due to refraction; also, the correction required to be made to the observed relative places of the two bodies. Double refraction (Opt.), the refraction of light in two directions, which produces two distinct images. The power of double refraction is possessed by all crystals except those of the isometric system. A uniaxial crystal is said to be optically positive (like quartz), or optically negative (like calcite), or to have positive, or negative, double refraction, according as the optic axis is the axis of least or greatest elasticity for light; a biaxial crystal is similarly designated when the same relation holds for the acute bisectrix. Index of refraction. See under Index. Refraction circle (Opt.), an instrument provided with a graduated circle for the measurement of refraction. Refraction of latitude, longitude, declination, right ascension, etc., the change in the apparent latitude, longitude, etc., of a heavenly body, due to the effect of atmospheric refraction. Terrestrial refraction, the change in the apparent altitude of a distant point on or near the earth's surface, as the top of a mountain, arising from the passage of light from it to the eye through atmospheric strata of varying density.

Soule's Dictionary of English Synonyms

n. 1. Bending, inclination. 2. Deterioration. See declension, 1. 3. Deviation, departure, oblique movement. 4. Declinature. See declension, 3.

Moby Thesaurus

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