Meaning of ICRF | Babel Free
Definitions
Initialism of International Celestial Reference Frame, the current standard celestial reference system adopted by the International Astronomical Union (IAU).
abbreviation, alt-of, initialism, uncountable
CEFR level
B1
Intermediate
This word is part of the CEFR B1 vocabulary — intermediate level.
This word is part of the CEFR B1 vocabulary — intermediate level.