octodecimo /ok-tō-desˈi-mō/

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

A book with sheets so folded

• overreaction
• overreactions
• overreacts
• overread
• overreading
• overreads
• overreckon
• overreckoned
• overreckoning
• overreckons
• overred
• overredded
• overredding
• overreds
• over-refine
• over-refined
• over-refinement
• over-refines
• over-refining
• overren
• overrenning
• overrens
• over-rev
• over-revs
• over-revved