octodecimo /ok-tō-desˈi-mō/

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

A book with sheets so folded

• spodumenes
• spoffish
• spoffy
• spoil
• spoilage
• spoilages
• spoil a horn
• spoil bank
• spoil banks
• spoiled
• spoiler
• spoilers
• spoiler signal
• spoilfive
• spoilfives
• spoilful
• spoil heap
• spoiling
• spoiling for
• spoiling tactics
• spoils
• spoilsman
• spoilsmen
• spoilsport
• spoilsports