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

See also: curved, curving, smooth

• sense
• sense datum
• sense experience
• sense impression
• sense modality
• forceps delivery
• forcer
• Forces of Umar Al-Mukhtar
• forcible
• forcibly
• forcing out
• forcipate
• ford
• Ford Hermann Hueffer
• Ford Madox Ford
• fordable
• Fordhooks
• fording
• fore
• fore edge
• fore plane
• fore-and-aft
• fore-and-aft rig
• fore-and-aft sail
• fore-and-aft topsail