1. Inability to see the colour blue or to distinguish the colours blue and yellow
   - blue-blind

See also: blind, tritanopia, unsighted

• ascarid
• Ascaridae
• Ascaridia
• Ascaridia galli
• Ascaris
• Ascaris lumbricoides
• ascend
• ascendable
• ascendance
• ascendancy
• anvil
• Anwar el-Sadat
• Anwar Sadat
• anxiety
• anxiety attack
• anxiety disorder
• anxiety hysteria
• anxiety neurosis
• anxiety reaction
• anxiolytic
• anxiolytic drug
• anxious
• anxiously
• anxiousness
• any