单词	ammonium
释义	ammonium noun am·​mo·​ni·​um ə-ˈmō-nē-əm  : an ion NH4+ derived from ammonia by combination with a hydrogen ion and known in compounds (such as salts) that resemble in properties the compounds of the alkali metals Example Sentences Recent Examples on the Web High in ammonium, magnesium, and phosphorus, the crystals are rich in nutrients and, importantly, slow to dissolve—slower even than synthetic slow-release fertilizer, says Inglett. Jesse Kathan, Smithsonian Magazine, 7 July 2022 The types of clouds on Jupiter are highly dependent on the chemical that forms them, with the three main cloud layers coming from ammonia (the top layer), ammonium hydrosulfide (a stinky middle layer), and water (a bottom layer). Tim Newcomb, Popular Mechanics, 27 June 2022 In some editions Friday, a Ukraine Crisis article about fertilizer prices incorrectly referred to it as ammonium. WSJ, 25 Mar. 2022 Its conditioning properties come from behentrimonium chloride, an ammonium salt that King says is an effective conditioner for detangling and smoothing the hair. Jennifer Hussein, Allure, 23 Mar. 2022 Two disinfectants known to be sprayed at Glades are called Mint and Maxim Neutral, and their ingredients that have raised concern are known as quaternary ammonium compounds, or QACs. Matthew Phelan, Scientific American, 17 Sep. 2021 Salicylic acid can be too harsh for dry skin, as can parabens, sodium laurel sulfate, ammonium lauryl sulfate, and some types of alcohol. Rachel Nussbaum, Health.com, 17 Jan. 2022 Scientists think its color may be the result of sunlight changing the chemical composition of the clouds of the ammonia, ammonium hydrosulfide and water it’s probably made of. NBC News, 28 Oct. 2021 The court probe centers on hundreds of tons of ammonium nitrates that had been improperly stored at a port warehouse that detonated on August 4, 2020, killing at least 215 people, injuring thousands and destroying parts of nearby neighborhoods. NBC News, 14 Oct. 2021 See More Word History Etymology New Latin, from ammonia First Known Use 1808, in the meaning defined above Phrases Containing ammonium ammonium carbonate ammonium cyanate ammonium chloride ammonium nitrate ammonium hydroxide ammonium sulfate ammonium phosphate quaternary ammonium compound ferric ammonium citrate ammonium carbonate ammonium cyanate ammonium chloride ammonium nitrate ammonium hydroxide ammonium sulfate ammonium phosphate quaternary ammonium compound ferric ammonium citrate See More Medical Definition ammonium noun am·​mo·​ni·​um ə-ˈmō-nē-əm  : an ion NH4+ derived from ammonia by combination with a hydrogen ion and known in organic compounds (as quaternary ammonium compounds) and in compounds (as salts) that resemble in properties the compounds of the alkali metals
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