polysulphide

/ 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

Example Sentences

Hence magnesium and sulphur combine under the action of pressure, forming magnesium sulphide and possibly a polysulphide.

From Project Gutenberg

After five compressions a mass is obtained which, in contact with moist air, gives off an odor of hydrogen polysulphide.

From Project Gutenberg