tetradymite[te trad′i mīt′]
a pale steel-gray mineral, BiTeS, consisting chiefly of tellurium and bismuth
Origin of tetradymiteGerman tetradymit ; from Classical Greek tetradymos, fourfold (because it occurs in compound twin crystals) + German -it, -ite
A steel-gray mineral, chiefly Bi2Te2S.
Origin of tetradymiteGerman Tetradymit, from Late Greek tetradumos, fourfold (from the double twin crystals in which it usually is found) : Greek tetra-, tetra- + didumos, double; see dwo- in Indo-European roots.