octodecimo /ok-tō-desˈi-mō/

1. Having eighteen leaves to the sheet
2. Contracted 18mo, often read eighteenmo

A book with sheets so folded

• dittays
• ditted
• dittied
• ditties
• ditting
• dittit
• ditto
• dittoed
• dittographies
• dittography
• dittoing
• dittologies
• dittology
• ditto marks
• dittos
• ditts
• ditty
• ditty bag
• ditty bags
• ditty box
• dittying
• ditz
• ditzes
• ditzier
• ditziest