1. Of, relating to, or using greater than normal pressure

Encyclopedia: Hyperbaric

• opinion poll
• opinionated
• opinionative
• opioid
• Opisthobranchia
• Opisthocomidae
• Opisthocomus
• Opisthocomus hoazin
• Opisthognathidae
• opisthognathous
• opisthorchiasis
• opisthotonos
• opium
• opium addict
• opium den
• opium poppy
• opium taker
• opopanax
• Oporto
• opossum
• opossum rat
• opossum shrimp
• opossum wood
• Oppenheimer
• oppidan