octodecimo /ok-tō-desˈi-mō/

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

A book with sheets so folded

• marbler
• marblers
• marbles
• marblier
• marbliest
• marbling
• marblings
• marbly
• Marburg disease
• marc
• MARC
• Marcan
• marcantant
• marcantants
• marcasite
• marcasites
• marcatissimo
• marcato
• marc brandy
• marcel
• Marcel
• marcella
• marcellas
• marcelled
• Marcelled