At a given point, the angle between magnetic north and true north. / At a given point, the angle between the line connecting this point with the geographical center of the earth and the equatorial plane.

plural of declination

Relating to declination.

A pessimistic belief that things are in decline.

(heraldry) Having the tail hanging down.

An instrument for taking the declination or angle which a plane makes with the horizontal plane. / (obsolete) A dissenter.

declinate

(rare) The act of declining or refusing.

Having a decline or slope.

One who declines. / (finance) A company's stock which is falling in price.