What does "terrestrial time" mean?

A time standard proposed by Sandford Fleming in the late 19th century to replace Greenwich time and Paris time by one that is universally adopted.

What is a synonym for "terrestrial time"?

Common synonyms include: ephemeris time, tdt, terrestrial dynamical time, tt.

name, noun

name, noun ·Rare ·Advanced level

Noun

1
A time standard proposed by Sandford Fleming in the late 19th century to replace Greenwich time and Paris time by one that is universally adopted.
"Whenever exact time was required for any purpose, terrestrial time, assuming it to be in general use, would be available."
2
(astronomy) a measure of time defined by Earth's orbital motion; terrestrial time is mean solar time corrected for the irregularities of the Earth's motions wordnet
3
Time based on the time system used on Earth, consisting of 24-hour days.

Proper Noun

1
Alternative letter-case form of Terrestrial Time. alt-of
2
A modern astronomical time standard defined by the International Astronomical Union, primarily for time-measurements of astronomical observations made from the surface of the Earth.

"Whenever exact time was required for any purpose, terrestrial time, assuming it to be in general use, would be available."