noun
: any of several compounds of phosphorus and sulfur obtained by heating these elements: as
a. : phosphorus sesquisulfide
b. : phosphorus pentasulfide
noun
: any of several compounds of phosphorus and sulfur obtained by heating these elements: as
a. : phosphorus sesquisulfide
b. : phosphorus pentasulfide
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012