the process or act of purifying or cleansing; the removal of impurities from something.
From 'depurate' plus '-tion,' a suffix forming nouns of action or process from Latin '-tio.' This nominalization is extremely common in scientific and medical terminology.
In environmental science, 'depuration' describes how shellfish and other organisms naturally filter and clean water—it's a process so important that it has its own formal scientific term!
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