pyrosulfuric

or py·ro·sul·phu·ric

[ pahy-roh-suhl-fyoo r-ik ]
/ ˌpaɪ roʊ sʌlˈfyʊər ɪk /

adjective Chemistry.

of or derived from pyrosulfuric acid; disulfuric.

Origin of pyrosulfuric

First recorded in 1870–75; pyro- + sulfuric