Pronunciation: (thûr'tē-tOO'mō), [key]
—n., pl. -mos,
1. a book size of about 3¼ × 5½ in. (8.3 × 14 cm), determined by printing on sheets that are folded to form 32 leaves or 64 pages. Symbol: 32mo, 32°
2. a book of this size.
printed, folded, or bound as a thirty-twomo.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.