Main entry: ribbed
Definition: furnished or strengthened with ribs
Antonyms: ribless
Definition: having no ribs or no visible ribs
Main entry: costate, ribbed
Definition: (of the surface) having a rough, riblike texture
Antonyms: smooth
Definition: having a surface free from roughness or bumps or ridges or irregularities
Antonyms: smooth
Definition: of motion that runs or flows or proceeds without jolts or turbulence
Antonyms: smooth
Definition: of the margin of a leaf shape; not broken up into teeth