OLEUM
- oil [n OLEUMS or OLEA] / a corrosive liquid [n OLEUMS or OLEA]
- a corrosive liquid [n OLEA, OLEUMS] / oil [n OLEA]
- oil
- heavy oily strongly corrosive solution of sulfur trioxide in anhydrous sulfuric acid
- oily, 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