marmoraceous,a.rare.|mɑːməˈreɪʃəs| [f. L. type *marmorāce-us, f.marmor marble: see -aceous.] Pertaining to, or like, marble. 1688R. Holme Armoury ii. 313/1 Marmo[ra]ceous, a Marble colour, a black blue.1822T. Nuttall in Amer.Jrnl.Sci. IV. 18 This marmoraceous mineral.1848Maunder Treas.Nat.Hist.