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polysulphide

British  
/ ˌpɒlɪˈsʌlfaɪd /

noun

  1. any sulphide of a metal containing divalent anions in which there are chains of sulphur atoms, as in the polysulphides of sodium, Na 2 S 2 , Na 2 S 3 , Na 2 S 4 , etc

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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"Reaction rates increased with higher polysulphide concentrations, as polysulphide serves as the reactive intermediates during SRR."

From Science Daily

Coating those same structures with water-loving polymers helped to trap the polysulphide products.

From Nature