1. Not exhibiting or characterized by careful thought
   - unthinking, unthoughtful

See also: thoughtless

• Angus Frank Johnstone Wilson
• Angus Og
• angwantibo
• anhedonia
• anhidrosis
• Anhima
• Anhima cornuta
• Anhimidae
• anhinga
• Anhinga anhinga
• Anhingidae
• anhydride
• anhydrite
• anhydrosis
• anhydrous
• ani
• Anicius Manlius Severinus Boethius
• aniconic
• anicteric
• Anigozanthus
• Anigozanthus manglesii
• anil
• anile
• aniline
• aniline dye