octodecimo /ok-tō-desˈi-mō/

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

A book with sheets so folded

• calefacients
• calefaction
• calefactions
• calefactive
• calefactor
• calefactories
• calefactors
• calefactory
• calefied
• calefies
• calefy
• calefying
• calembour
• calembours
• calendar
• calendared
• calendarer
• calendarers
• calendaring
• calendarisation
• calendarise
• calendarised
• calendarises
• calendarising
• calendarist