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twentymo
[ twen-tee-moh, twuhn- ]
noun
, plural twen·ty·mos.
- a book size of about 3 × 5 inches (8 × 12 centimeters), determined by printing on sheets folded to form 20 leaves or 40 pages.
- a book of this size. : 20mo, 20°
adjective
- in twentymo.
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