1. Free of ice and open to travel
   "an ice-free channel in the river"

See also: unfrozen

• radiotherapy equipment
• radiothorium
• radish
• radish plant
• radium
• radium therapy
• radius
• radius of curvature
• radius vector
• radix
• radome
• radon
• radula
• Radyera
• Radyera farragei
• raetam
• RAF
• Raffaello Santi
• Raffaello Sanzio
• raffia
• Raffia farinifera
• raffia palm
• Raffia ruffia
• Raffia taedigera
• Raffia vinifera