octodecimo

[ ok-tuh-des-uh-moh ]

noun

, plural oc·to·dec·i·mos

1. a book size of about 4 × 6 1/4 inches (10 × 16 centimeters), determined by printing on sheets folded to form 18 leaves or 36 pages. : 18mo, 18°
2. a book of this size.

adjective

1. in octodecimo.

octodecimo

/ ˌɒktəʊˈdɛsɪməʊ /

noun

1. bookbinding another word for eighteenmo

Word History and Origins

Origin of octodecimo¹

First recorded in 1855–60; short for New Latin in octōdecimō “in an eighteenth (of a sheet)”

Word History and Origins

Origin of octodecimo¹

C18: from New Latin phrase in octodecimo in an eighteenth (of a whole sheet)

Example Sentences

Other sizes occasionally used are called “sixteenmo” or “sextodecimo,” “eighteenmo” or “octodecimo,” etc.

From Project Gutenberg