1. Warding off
   - prophylactic 
2. Serving to warn
   - admonitory, exemplary, monitory, warning

See also: caution, dissuasive, protective

• genus Anthonomus
• genus Anthriscus
• genus Anthurium
• genus Anthus
• genus Anthyllis
• genus Antidorcas
• genus Antigonia
• genus Antilocapra
• genus Antilope
• genus Antirrhinum
• genus Antrodemus
• genus Antrozous
• genus Aotus
• genus Apatosaurus
• genus Apatura
• genus Aphis
• genus Aphriza
• genus Aphrophora
• genus Aphyllanthes
• genus Apios
• genus Apis
• genus Apium
• genus Aplectrum
• genus Aplodontia
• genus Aplysia