The story
Abbreviation of sixty-fourth
Etymology from Wiktionary, CC BY-SA 4.0.
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Today it means: a book size one sixty-fourth of the size of a standard uncut sheet of paper (less 7.5 cm (3") in height) Full definition →
Today it means: a book size one sixty-fourth of the size of a standard uncut sheet of paper (less 7.5 cm (3") in height) Full definition →
Abbreviation of sixty-fourth
Etymology from Wiktionary, CC BY-SA 4.0.