crateral,a.|ˈkreɪtərəl| [f. crater n. + -al1.] Of, belonging to, of the nature of, a (volcanic) crater. 1860W. Webb in Med. Times 4 Feb. 118/2 The alluvial deposits in crateral abysses.1878Huxley Physiogr. 195 A new cone seated within the old crateral hollow.