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]

• middle temporal vein
• middle term
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• Mideast
• midfield