cretaceous/krɪˈteɪʃəs; krɪ`teʃəs/ adj(geology 地质)1 of or like chalk 白垩质的; 似白垩的 cretaceous rock 白垩质的岩石.2 Cretaceous of the geological period when chalk-rocks were formed 白垩纪 Cretaceous fossils 白垩纪的化石.
牛津英汉双解词典