octodecimo /ok-tō-desˈi-mō/

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

A book with sheets so folded

• handsel
• handselled
• handselling
• Handsel Monday
• handsels
• handset
• handsets
• hand-sewing
• hand-sewn
• hands-free
• hands-frees
• handshake
• handshakes
• handshaking
• handshakings
• hands off
• hands-off
• handsome
• handsomely
• handsomeness
• handsomenesses
• hand someone a lemon
• handsomer
• handsomest
• hands-on