from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A corrosive compound, SO3, having three solid forms that may coexist in a given sample, used in the sulfonation of organic compounds.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A corrosive liquid, SO3, which forms sulfuric acid on contact with water; made commercially by the oxidation of sulfur dioxide.
Sorry, no etymologies found.