1. Widely distributed herbs and shrubs and trees; sometimes placed in the order Scrophulariales
   - Acanthaceae, acanthus family

Type of: asterid dicot family

Part of: order Polemoniales, Polemoniales

• Aleksandr Sergeyevich Pushkin
• Aleksandr Solzhenitsyn
• Aleksey Maksimovich Peshkov
• Aleksey Maximovich Peshkov
• alembic
• alendronate
• Alep
• aleph
• aleph-nought
• aleph-null
• aleph-zero
• Alepisaurus
• Aleppo
• Aleppo boil
• Aleppo grass
• alert
• alerting
• alertly
• alertness
• Alessandro di Mariano dei Filipepi
• Alessandro Farnese
• Alessandro Manzoni
• alethic logic
• Aletris
• Aletris aurea