Dictionary.com

Popular Searches

 Thesaurus.com

twentymo

American  
[twen-tee-moh, twuhn-] / ˈtwɛn tiˌmoʊ, ˈtwʌn- /

noun

PLURAL

twentymos

  1. a book size of about 3 × 5 inches (8 × 12 centimeters), determined by printing on sheets folded to form 20 leaves or 40 pages.

  2. a book of this size. 20mo, 20°

adjective

  1. in twentymo.

Etymology

Origin of twentymo

First recorded in 1835–45; twenty + -mo

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

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.