1. Having no ribs or no visible ribs

Antonym: ribbed

• cycle
• cycle of rebirth
• cycle on
• cycle path
• cycle per second
• cycle rickshaw
• cycler
• cycles per second
• cycles/second
• cycleway
• cyclic
• cyclic disorder
• cyclic neutropenia
• cyclic redundancy check
• cyclical
• cyclically
• cyclicity
• cycling
• Cycliophora
• cyclist
• cyclo-
• cyclobenzaprine
• cyclodestructive surgery
• cyclohexanol
• cyclohexanol phthalate