from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A yellow-white powder prepared in an aqueous solution and used as a detergent, fungicide, bactericide, and spermicide.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A nitrogenous cationic surface-acting agent of the quaternary ammonium group, used as a biocide, as a cationic surfactant and as a phase transfer agent in the chemical industry.
benz(o)- + alk(yl) + (amm)onium.(American Heritage® Dictionary of the English Language, Fourth Edition)