COSTATE

costate

(adjective) having ribs

costate, ribbed

(adjective) (of the surface) having a rough, riblike texture

Source: WordNet® 3.1

Etymology

Adjective

costate (not comparable)

Having ribs, or the appearance of ribs

(botany) Having one or more longitudinal ribs

Source: Wiktionary

Cos"tate (ks"tt), Cos"ta*ted (-t-td), a. Etym: [L. costatus, fr. costa rib.]

Definition: Having ribs, or the appearance of ribs; (Bot.) having one or more longitudinal ribs.

Source: Webster’s Unabridged Dictionary 1913 Edition