Definition:
oleum
- oleumoily, hygroscopic, corrosive liquid, H2S2O7, that, depending on purity, is colorless or dark brown: used chiefly as a dehydrating agent in the manufacture of explosives and as a sulfating or sulfonating agent in the manufa
- oleumoil / a corrosive liquid
- oleumheavy oily strongly corrosive solution of sulfur trioxide in anhydrous sulfuric acid
- oleumoil