forty-eightmo

American  

[fawr-tee-eyt-moh] / ˈfɔr tiˈeɪt moʊ /

noun

plural

forty-eightmos

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

2. a book of this size.

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adjective

1. in forty-eightmo.

Etymology

Origin of forty-eightmo

First recorded in 1885–90; forty-eight + -mo