octodecimo /ok-tō-desˈi-mō/

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

A book with sheets so folded

• irrealisable
• irrealities
• irreality
• irrealizable
• irrebuttable
• irrebuttable presumption
• irreceptive
• irreciprocal
• irreciprocities
• irreciprocity
• irreclaimability
• irreclaimable
• irreclaimableness
• irreclaimably
• irrecognisable
• irrecognition
• irrecognitions
• irrecognizable
• irreconcilability
• irreconcilable
• irreconcilableness
• irreconcilables
• irreconcilably
• irreconciled
• irreconcilement