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molybdenum disulfide

noun Chemistry.

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

Origin of molybdenum disulfide

First recorded in 1930–35

Also called molybdenum sulfide.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019