phosphorus sesquisulfide

noun

Definition of phosphorus sesquisulfide

: a flammable yellow crystalline compound P4S3 used chiefly in the manufacture of matches; tetra-phosphorus trisulfide not used systematically

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“Phosphorus sesquisulfide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/phosphorus%20sesquisulfide. Accessed 16 Jan. 2021.

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