Definitions for: Ribbed

[adj] furnished or strengthened with ribs
[adj] (of the surface of shells) having a rough, rib-like texture

Webster (1913) Definition: Ribbed, a.
1. Furnished or formed with ribs; as, a ribbed cylinder;
ribbed cloth.

2. (Mining) Intercalated with slate; -- said of a seam of
coal. --Raymond.

Synonyms: costate, riblike, rough, unsmooth

Antonyms: ribless