64mo

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A size of paper or book: 1.87"-2.5" x 2.5"-3.125". uncountable, usually

    "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]"

Example

More examples

"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]"

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.