the world > life > biology > physical aspects or shapes > projection or protuberance > [adjective] > ridge (3)
Natural History. Furnished with a raised welt or projecting edge. welted thistle: see welted thistle n. at thistle, n. compounds 1.
transferred. Marked as with wrinkles, i.e. with parallel folds, ridges, or furrows. spec. in Botany, Zoology, etc.: cf. corrugate, adj.
Having a central dorsal ridge; carinate.