Greenwich time and Mean solar time

Greenwich time noun - The local time at the 0 meridian passing through Greenwich, England; it is the same everywhere.

Mean solar time and greenwich time are semantically related. In some cases you can replace phrase "Mean solar time" with "Greenwich time", this phrases are similar.

Mean solar time noun - Astronomy) time based on the motion of the mean sun (an imaginary sun moving uniformly along the celestial equator.

Greenwich time and mean solar time are semantically related. Sometimes you can replace phrase "Greenwich time" with "Mean solar time", this phrases are similar.