Having been filtered; separated using a filter to remove impurities or solids.
From filtrate (verb, from Latin filtrare) + -ed (past participle). The verb 'filtrate' means to subject to filtration, so 'filtrated' is the resulting state.
In scientific writing, you'll see 'filtrated' used as an adjective to describe materials that have been processed through filtration, distinguishing them from unfiltered versions in experiments.
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