octodecimo /ok-tō-desˈi-mō/

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

A book with sheets so folded

• embryologist
• embryologists
• embryology
• embryon
• embryonal
• embryonate
• embryonated
• embryonic
• embryonically
• embryons
• embryophyta
• embryos
• embryo-sac
• embryo-sacs
• embryotic
• embryotically
• embryotomies
• embryotomy
• embryo transfer
• embryo transfers
• embryulcia
• embryulcias
• embus
• embusied
• embusies