Declination definition

dĕklə-nāshən
A refusal to accept.
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A sloping or bending downward.
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A falling off, especially from prosperity or vigor; a decline.
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A deviation, as from a specific direction or standard.
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A bending or sloping downward; deviation from the horizontal or vertical.
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An oblique variation from some definite direction.
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The angle formed by a magnetic needle with the line pointing to the geographical North Pole.
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(archaic) Decline; deterioration; decay.
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(astronomy) The angular distance to a point on a celestial object, measured north (in positive degrees) or south (in negative degrees) from the celestial equator.
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The angular distance of a celestial body north or south from the celestial equator: it is used with right ascension to find an exact position in the sky.
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On the celestial sphere, the position of a celestial object north or south of the celestial equator . Declination is measured in degrees along a great circle drawn through the object being measured and the north and south celestial poles, with positive values north of the celestial equator and negative values south of it, so that the equator itself is 0° and the north and south celestial poles are +90° and −90° declination respectively.
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At a given point, the angle between magnetic north and true north.
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At a given point, the angle between the line connecting this point with the geographical center of the earth and the equatorial plane.
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(grammar) Declension.
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(archaic) The act or state of bending downward; inclination.

Declination of the head.

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(archaic) The act or state of falling off or declining from excellence or perfection; deterioration; decay; decline.
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(archaic) Deviation.
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A polite declining or refusal.
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Other Word Forms

Noun

Singular:
declination
Plural:
declinations

Origin of declination

  • Middle English declinacioun from Old French declination from Latin dēclīnātiō dēclīnātiōn- from dēclīnātus past participle of dēclīnāre to turn away decline

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Middle English declinacioun, from Middle French declination, from Latin declinatio.

    From Wiktionary