declination

(noun) a condition inferior to an earlier condition; a gradual falling off from a better state. Synonyms: decline.

(noun) a downward slope or bend. Synonyms: descent, declivity, fall, decline, declension, downslope.

(noun) (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. Synonyms: celestial latitude, dec.

(noun) a polite refusal of an invitation. Synonyms: regrets.