twenty-fourmo

[ twen-tee-fawr-moh, -fohr-, twuhn- ]

noun

, plural twen·ty-four·mos.

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°

adjective

1. in twenty-fourmo.

Word History and Origins

Origin of twenty-fourmo¹

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 Project Gutenberg

As in the case of the Chinese book, it looks superficially like ours; we think it is a tiny quarto until we see that its measure is rather that of an oblong twenty-fourmo; that is, its dimensions are just scant of five inches high and six inches wide.

From Project Gutenberg