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Meaning of 18mo | Babel Free

Noun CEFR B1

Definitions

Abbreviation of octodecimo, a page size.
abbreviation, alt-of, uncountable, usually
A book size octodecimo-sized pages.
uncountable, usually

CEFR level

B1

Intermediate
This word is part of the CEFR B1 vocabulary — intermediate level.

See also

19-gon 1900s 190s 1910s 1920s 1930's