A mineral form of molybdenum sulfide, MoS2, that's the principal ore of molybdenum.
A mineral, molybdenum disulfide MoS2, that's the main ore of molybdenum; its structurally similar to graphite and has now a similar appear and feel.
A mineral happening in smooth, lead-gray, foliated masses or machines, resembling graphite; sulphide of molybdenum.
Sulphid of molybdenum, occurring in foliated public or in machines, less usually in hexagonal crystals, of a lead-gray shade and metallic luster. It is very smooth, and, like graphite, which it closely resembles, renders a trace in writing.
a mineral resembling graphite which appreciated while the main source of molybdenum and its substances