octodecimo /ok-tō-desˈi-mō/

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

A book with sheets so folded

• joyrode
• joys
• joystick
• joysticks
• joy-wheel
• joy-wheels
• JP
• JPEG
• J-pen
• jr
• Jr
• JSA
• juba
• jubas
• jubate
• jubbah
• jubbahs
• jube
• jubes
• jubilance
• jubilances
• jubilancies
• giant rude
• giantry
• giants