Webster's English Dictionary

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declination

dec.li.na.tion \.dek-l*-'na--sh*n\ \-'na--shn*l, -sh*n-*l\ n [ME 
   declinacioun, fr. MF declination, fr. L declination-, ]declinatio turning 
   aside, altitude of the pole 1: angular distance north or south from the 
   celestial equator measured alon g a great circle passing through the 
   celestial poles 2: a turning aside or swerving  3: a decline esp. from 
   vigor  4: a bending downward : INCLINATION  5: a formal refusal  6: the 
   angle formed between a magnetic needle and the geographical meridian  - 
   dec.li.na.tion.al aj