Phrase guide

terrestrial time

name · noun · 5 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

name

Meaning 1

Alternative letter-case form of Terrestrial Time.

Definition source: English Wiktionary via Wiktextract

Usage: alt-of

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

name

Meaning 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.

Definition source: English Wiktionary via Wiktextract

Topics: astronomy, natural-sciences, time

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: Terrestrial Dynamical Time

Antonyms: none provided

3

noun

Meaning 3

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.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

Time based on the time system used on Earth, consisting of 24-hour days.

Definition source: English Wiktionary via Wiktextract

Topics: literature, media, publishing, science-fiction

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

(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

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: TT, terrestrial dynamical time, TDT, ephemeris time

Antonyms: none provided

Broader terms: time unit, unit of time

History

Etymology

No etymology was provided for this word.