This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. That can be filtered or separated by filtering: filterable solutions of granular matter.

adj. That can pass through a given pore size.

adj. Able to be separated by filtration

adj. That can pass through a specified filter

"The class of organisms known as the filterable viruses or the ultra-microscopic or the invisible organisms have a special interest in many ways."

filterable virus   

proteanic    once-living    disease-causing    choriomeningitis    descolada    searchable    flu-like    single-cell    submicroscopic    mottle