Liquid that has passed through a filter, especially the clear liquid separated from solid particles or impurities.
From Latin filtrare (to strain), possibly from felt-like filtering material (Medieval Latin filtrum) + -ate (noun suffix). This scientific term emerged in chemistry to describe the liquid product of filtration.
When you brew coffee, the dark liquid dripping into your cup is filtrate—the water has filtered through grounds and left the solids behind! It's a common household chemistry process that scientists use for sophisticated purification.
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