English Dictionary

rotational period

noun

(of an astronomic object) The time taken to rotate about its axis relative to the background stars.

The rotational period of the Earth is approximately 24 hours.

意味（1）

(of an astronomic object) The time taken to rotate about its axis relative to the background stars.

意味（2）

(of a rotating object on the earth) The time taken to rotate about its axis relative to the earth (assumed fixed).