1. Without a date fixed (as of an adjournment)

Encyclopedia: Sine die

• Ophrys
• Ophrys apifera
• Ophrys insectifera
• Ophrys muscifera
• Ophrys sphegodes
• ophthalmectomy
• ophthalmia
• ophthalmia neonatorum
• ophthalmic
• ophthalmic artery
• ophthalmic vein
• ophthalmitis
• ophthalmologist
• ophthalmology
• ophthalmoplegia
• ophthalmoscope
• ophthalmoscopy
• opiate
• Opiliones
• opine
• opinion
• opinion poll
• opinionated
• opinionative
• opioid