1. The doctrine of aesthetics; aesthetic principles; devotion to the beautiful in nature and art
   - aestheticism

Derived forms: estheticisms

• order Aphyllophorales
• order Aplacophora
• order Apodes
• order Apodiformes
• order Apterygiformes
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• order Araneae
• order Araneida
• order Aristolochiales
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• order Artiodactyla
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• order book
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• order Campanulales
• order Caprimulgiformes
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