Containing no nitrogen or lacking nitrogen as a component.
From prefix 'a-' (without), combined with 'nitrogen' (from French 'nitrogène'), plus '-ous' (adjective suffix). Used in chemistry to describe substances without this essential element.
Most living things need nitrogen to make proteins and DNA, but some chemical compounds are deliberately nitrogen-free because nitrogen can trigger dangerous reactions—like in certain explosives or medications. It's chemistry's safety valve!
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