quaternary ammonium compound

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noun 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.

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Also called quaternary ammonium salt .

Origin of quaternary ammonium compound

First recorded in 1815–25

Words nearby quaternary ammonium compound

quat., quater, quatercentenary, quatercentennial, quaternary, quaternary ammonium compound, quaternary structure, quaternate, quaternion, quaternity, Quathlamba

How to use quaternary ammonium compound in a sentence

He scrambled outside to find a 25-foot-wide crater just beyond the mud wall surrounding his family compound.
The Dangerous Drug-Funded Secret War Between Iran and Pakistan|Umar Farooq|December 29, 2014|DAILY BEAST
Less than 30 minutes after the firefight started, commandos entered the compound and found the mortally wounded hostages.
Did U.S. Policy Get Luke Somers Killed?|Shane Harris|December 6, 2014|DAILY BEAST
They say that the Israelis framed him in order to light the powder keg of religious war over the al-Aqsa compound.
In Jerusalem Home Demolitions, the Biblical Justice of Revenge|Creede Newton|November 25, 2014|DAILY BEAST
The Holy City, specifically the al-Aqsa compound, has been the flashpoint for the latest round of conflict.
The Radicals Who Slaughtered a Synagogue|Creede Newton|November 19, 2014|DAILY BEAST

Now the lead breacher explained how he cut through the steel doors bin Laden used to seal himself into the compound at night.
I Shot Bin Laden|Elliot Ackerman|November 16, 2014|DAILY BEAST
He, with others, thinking the miss-sahib had gone to church, was smoking the hookah of gossip in a neighboring compound.
The Red Year|Louis Tracy
They held the compound against repeated assaults, and lost several men in hand-to-hand fighting.
The Red Year|Louis Tracy
Passing a bungalow that was blazing furiously, he saw in the compound the corpses of two women.
The Red Year|Louis Tracy
The sediment usually contains abundant amorphous phosphates and crystals of triple phosphate and ammonium urate.
A Manual of Clinical Diagnosis|James Campbell Todd
The body of a young woman was found in the compound outside my bungalow, done to death in precisely the same way.
Uncanny Tales|Various

British Dictionary definitions for quaternary ammonium compound

quaternary ammonium compound

noun

a 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