metasedimentary adjective 1noun 1forms 1 adjective1 •Of or pertaining to a metasediment. noun1 •A metasediment.The absence of sedimentaries and metasedimentaries in W52 suggest it is not from the Sepik north coast, which is defined by heterogeneous lithic inclusions derived from the Torricelli Mountains. — 2015 formsmetasedimentaries
