octodecimo /ok-tō-desˈi-mō/

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

A book with sheets so folded

• perforant
• perforate
• perforated
• perforates
• perforating
• perforation
• perforations
• perforative
• perforator
• perforators
• perforatus
• perforatuses
• perforce
• perform
• performable
• performance
• performance art
• performance artist
• performance artists
• performance arts
• performance poet
• performance poetry
• performance poets
• performances
• performance test