1. Of a chemical compound having a ring with four members
   - four-membered

See also: membered

• Roche limit
• Rochelle powder
• Rochelle salt
• Rochelle salts
• Rochester
• rochet
• Rochon prism
• rock
• rock 'n' roll
• rock 'n' roll musician
• rock band
• rock barnacle
• rock bass
• rock beauty
• rock bit
• rock brake
• rock cake
• rock candy
• rock climber
• rock climbing
• rock concert
• Rock Cornish
• Rock Cornish hen
• rock crab
• rock crystal