Having undergone denitrification; having had nitrogen compounds removed or converted.
Past participle of denitrify. The -ified ending is a variant of -fied (from Latin -ficare, 'to make'), which typically follows a prefix like de-.
When a substance is 'denitrified,' nitrogen atoms have been literally rearranged—often converted into nitrogen gas that escapes into the atmosphere, a key step in Earth's nitrogen cycle.
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