Astronomy Answers
From the Astronomical Dictionary

[Astronomy Answers] [Dictionary] [AnswerBook] [Universe Family Tree] [Science] [Starry Sky] [Planet Positions] [Calculate] [Colophon]

The description of the word you requested from the astronomical dictionary is given below.

the declination

declinatio = [Latin] deviation

The declination is the coordinate in the equatorial coordinate system in the sky that is similar to latitude on Earth. It ranges between −90 degrees at the southern celestial pole and +90 degrees at the northern celestial pole and is zero at the celestial equator. The other equatorial coordinate is the right ascension.