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forty-eightmo

[ fawr-tee-eyt-moh ]
/ ˈfɔr tiˈeɪt moʊ /
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noun, plural for·ty-eight·mos for 2.

a book size of about 2½ × 4 inches (6 × 10 centimeters), determined by printing on sheets folded to form 48 leaves or 96 pages. Abbreviations: 48mo, 48°
a book of this size.

adjective

in forty-eightmo.

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Origin of forty-eightmo

First recorded in 1885–90; forty-eight + -mo
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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