| 单词 | quaternary ammonium compound |
| 释义 | quaternary ammonium compoundnoun Chemistry.any of a class of salts derived from ammonium in which the nitrogen atom is attached to four organic groups, as in benzalkonium chloride; the salts are cationic surface-active compounds used as antiseptics and disinfectants. Also called quaternary ammonium salt . Origin of quaternary ammonium compoundFirst recorded in 1815–25 Words nearby quaternary ammonium compoundquat., quater, quatercentenary, quatercentennial, quaternary, quaternary ammonium compound, quaternary structure, quaternate, quaternion, quaternity, Quathlamba Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for quaternary ammonium compoundquaternary ammonium compound nouna type of ionic compound that can be regarded as derived from ammonium compounds by replacing the hydrogen atoms with organic groups Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 |
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