\(\def\|{&}\)
The description of the word you requested from the astronomical dictionary is given below.
differentis = [Latin] different; rotatio = [Latin] rotation
Differential rotation is rotation in which not every part of the object has the same period of rotation. Only objects that are not solid can show differential rotation. In the Solar System, differential rotation occurs in, among other things, the Sun, the giant gaseous planets, and the atmosphere of the Earth.