octodecimo /ok-tō-desˈi-mō/

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

A book with sheets so folded

• blanket sprays
• blanket stitch
• blanketweed
• blanketweeds
• blankety-blank
• blankety blank blank
• blankety-blanky
• blanking
• blankings
• blankly
• blankness
• blanknesses
• blanks
• blank verse
• blank verses
• blank window
• blanquet
• blanquets
• blanquette
• blanquettes
• blare
• blared
• blares
• blaring
• blarney