molybdenum disulfide

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noun Chemistry.

a black crystalline powder, MoS2, insoluble in water, used as a lubricant and as a hydrogenation catalyst.

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Also called molybdenum sulfide.

Origin of molybdenum disulfide

First recorded in 1930–35

Iron and copper ores frequently contain molybdenum, sometimes in quantity; consequently it is met with in slags and pig-iron.
A Textbook of Assaying: For the Use of Those Connected with Mines.|Cornelius Beringer and John Jacob Beringer
All molybdenum compounds are converted into the trioxide by boiling with nitric acid.
A Textbook of Assaying: For the Use of Those Connected with Mines.|Cornelius Beringer and John Jacob Beringer
Vanadium is white, and when its surface is polished, it resembles silver or molybdenum more than any other metal.
A Dictionary of Arts, Manufactures and Mines|Andrew Ure
We noted a similar close resemblance between the positive strontium and the negative molybdenum.
Occult Chemistry|Annie Besant and Charles W. Leadbeater

It consumes a lot in its own steel industry, even using manganese as a substitute for scarcer alloys like nickel and molybdenum.
East-West Trade Trends|Harold E. Stassen