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Meaning of ephemeris time | Babel Free

Noun CEFR B2

Definitions

A former standard astronomical time scale intended to overcome the drawbacks of irregularly fluctuating mean solar time, superseded in the 1970s.
uncountable
A modern relativistic-coordinate time scale.
uncountable

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

ephemerist ephemeroid ephemeron ephemerophyte ephemeropteran ephemerovirus