64mo

noun

A size of paper or book: 1.87"-2.5" x 2.5"-3.125".

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Meanings

noun64mo (usually uncountable, plural 64mos)

plural 64mos

  1. uncountableusuallypapermediaA size of paper or book: 1.87"-2.5" x 2.5"-3.125".

    39. Reed, C. A., H. F. Harvey, & R. I. Brasher. WESTERN BIRD GUIDE: Birds of the Rockies & West to the Pacific. 286 pgs with index. Color prints throughout. Red fabricoid, with chipped cardboard slipcase. Oblong 64mo. NY: Doubleday, Doran, 1937. Very good condition, with fair case. $21.50 [115273]

    2000 April 29, Acorn Books, “FS: 2nd Miscellany of 25 NEW ARRIVALS, Sat., April 29, 2000.”, in rec.arts.books.marketplace (Usenet)

Synonyms & antonyms

Also see
sexagesimo-quartosf
Cite this entry
APA

64mo. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/64mo

MLA

“64mo.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/64mo. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “64mo,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/64mo.

Source: 64mo on Wiktionary, CC BY-SA 4.0.