molybdenum disulfide

noun Chemistry.
a black crystalline powder, MoS 2 , insoluble in water, used as a lubricant and as a hydrogenation catalyst.
Also called molybdenum sulfide.

1930–35 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
Molybdenite, a relatively inexpensive mineral of molybdenum disulfide, has a
  layered structure similar to that of raw graphite.
The leached molybdenum disulfide is dried and stored in bins.
Molybdenum disulfide competes as a dry lubricant, but is more sensitive to
  oxidative conditions.
The dry lubricant shall be molybdenum disulfide based.
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