polysulfide

noun
poly·sul·fide | \ˌpä-lē-ˈsəl-ˌfīd \

Definition of polysulfide 

: a sulfide containing two or more atoms of sulfur in the molecule

First Known Use of polysulfide

1849, in the meaning defined above

History and Etymology for polysulfide

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The first known use of polysulfide was in 1849

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