eighteenmo

American

[ey-teen-moh] / ˈeɪˈtin moʊ /

noun

plural

eighteenmos

octodecimo.

eighteenmo British

/ ˈeɪˈtiːnməʊ /

noun

Also called: octodecimo. Often written: 18mo. 18°. a book size resulting from folding a sheet of paper into 18 leaves or 36 pages
a book of this size

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of eighteenmo

eighteen + -mo

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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

From Project Gutenberg

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023