declination

definition: 
The angular distance of a point north or south of the celestial equator;The angular deviation of a compass needle from true north (because the magnetic north pole and the geographic north pole do not coincide).
sentence: 
To calculate the distance we need to know the declination of the sun on a given day.
The compass needle and a knowledge of magnetic declination, the angle between the magnetic north and geographic north, were developments from this knowledge; they were described by Shen Kua in 1088
difficulty: 
easy
toefl frequency: 
2
toefl classification: