twenty-fourmo

American  

[twen-tee-fawr-moh, -fohr-, twuhn-] / ˌtwɛn tiˈfɔr moʊ, -ˈfoʊr-, ˈtwʌn- /

noun

plural

twenty-fourmos

1. a book size of about 3 5/8 × 5 1/8 inches (9 × 13 centimeters), determined by printing on sheets folded to form 24 leaves or 48 pages.

2. a book of this size. 24mo, 24°

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adjective

1. in twenty-fourmo.

Etymology

Origin of twenty-fourmo

First recorded in 1835–45; twenty-four + -mo

Example Sentences

Here is a table full of old parchment-bound books, ranging from a tiny twenty-fourmo, which will stay neither open nor shut, to thin, limp folios that are instantly correspondent to either command.

From The Booklover and His Books by Koopman, Harry Lyman