an acid, H2S2O6, having two sulfur atoms in each molecule and existing only in salts or solutions
Word origin
di-1 + thionic
dithionic acid in American English
noun
Chemistry
a strong, unstable acid, H2S2O6, known only in solution and in the form of its salts
Word origin
[1850–55]This word is first recorded in the period 1850–55. Other words that entered Englishat around the same time include: boneyard, ethylene, headhunting, heavyweight, overprint