1. Having a thickness made up of three layers or strands
   "three-ply cloth"; "three-ply yarn"

See also: thick

• rivetter
• Riviera
• Rivina
• Rivina humilis
• rivulet
• rivulus
• Riyadh
• riyal
• riyal-omani
• rms
• Rn
• RNA
• RNA polymerase
• RNase
• RNIB
• RNLI
• Ro
• ro-ro
• roach
• roach clip
• roach holder
• roaching
• road
• road agent
• road builder