1. Curved or curving in and out
   - sinuous, wiggly 
2. Having a strongly waved margin alternately concave and convex

See also: curved, curving, smooth

• Atacama Trench
• atactic
• atactic abasia
• Atakapa
• Atakapan
• ataman
• atar
• ataractic
• ataractic agent
• ataractic drug
• Atarax
• ataraxia
• ataraxic
• ataraxis
• ataraxy
• Ataturk
• atavism
• atavist
• atavistic
• ataxia
• ataxic
• ataxic abasia
• ataxic aphasia
• ataxy
• Atayalic