carapacial,a.|kærəˈpeɪʃ(ɪ)əl| [f. carapace + -ial.] Of or pertaining to a carapace. 1880T. H. Huxley Crayfish iv. 217 The lateral portions of the carapacial ridge. So carapacic|kærəˈpeɪsɪk|a. 1903Ann. & Mag.Nat.Hist. XI. 442 The carapacic portion of the dorsal scute.