cetyltrimethylammoniumWiktionary 原文英美构词拆解cetylcetyl词干trimethyltrimethyl词干ammoniumammonium词干词源说明From cetyl + trimethyl + ammonium.释义名词noun1(organic chemistry) The long-chain quaternary ammonium cation C16H33N(CH3)3+ known as cetrimonium in medical applications.