1) Capable of being filtered 1) Filtrable 
Capable of passing a filter; frequently applied to smaller viruses and some bacteria. ... (05 Mar 2000) ... 
(fil´tәr-ә-bәl) capable of passing through the pores of a filter; usually referring to living infectious agents such as viruses that can pass through a filter that retains the usual pathogenic bacteria. This attribute was key in the initial discovery of viruses.
capable of being filtered. · capable of passing through bacteria-retaining filters.