1. Having no ribs or no visible ribs

Antonym: ribbed

• divers
• diverse
• diversely
• diverseness
• diversification
• diversified
• diversify
• diversion
• diversionary
• diversionary attack
• diversionary landing
• diversionist
• diversity
• divert
• diverted
• diverter
• diverticular
• diverticulitis
• diverticulosis
• diverticulum
• divertimento
• diverting
• divertingly
• divertissement
• divest