noun
a type of chemiluminescent compound used in analytical chemistry for detecting certain substances
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The chemist used acridinium as a chemiluminescent label in the experiment.
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I heard acridinium is a key component in those glow-in-the-dark stickers.
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Don't touch that, it smells like acridinium!
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The tension in the room was so thick, you could cut it with a knife, like acridinium in the air.