1. Of or relating to the philosophical study of causation
   - etiological [N. Amer], etiologic [N. Amer], aetiological [Brit, Cdn] 
2. Relating to the aetiology of a disease
   - etiological [N. Amer], etiologic [N. Amer], aetiological [Brit, Cdn]

See also: aetiology [Brit, Cdn]

• roper
• ropewalk
• ropewalker
• ropeway
• ropey
• rophy
• ropiness
• roping
• ropy
• roque
• Roquefort
• Roquefort dressing
• roquelaure
• roquet
• roquette
• roridula
• Roridulaceae
• Rorippa
• Rorippa amphibia
• Rorippa islandica
• Rorippa nasturtium-aquaticum
• rorqual
• Rorschach
• Rorschach test
• rort