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a virus particle small enough to pass through a filter of diatomaceous earth or porcelain, which will not pass bacteria: chiefly historical or an informal indicator of size, as synthetic membrane filters now permit passage of the smallest virus.


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    noun 1. (chem) the solid material accumulated by a filter press

  • Filterer

    [fil-ter] /ˈfɪl tər/ noun 1. any substance, as cloth, paper, porous porcelain, or a layer of charcoal or sand, through which liquid or gas is passed to remove suspended impurities or to recover solids. 2. any device, as a tank or tube, containing such a substance for filtering. 3. any of various analogous devices, as […]

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