1. Consisting of or especially arranged in sets of four
   "quaternate leaves"
   - quaternary

See also: multiple

• ox
• ox-eyed
• ox-eyed daisy
• oxacillin
• oxalacetate
• oxalacetic acid
• oxalate
• oxalic acid
• Oxalidaceae
• oxalis
• Oxalis acetosella
• Oxalis caprina
• Oxalis cernua
• Oxalis corniculata
• Oxalis crenata
• Oxalis pes-caprae
• Oxalis tuberosa
• Oxalis violacea
• oxaloacetate
• oxaloacetic acid
• Oxandra
• Oxandra lanceolata
• oxaprozin
• oxazepam
• oxblood