filterable virus

American  

noun

1. 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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Etymology

Origin of filterable virus

First recorded in 1910–15

Example Sentences

No one has ever isolated a microbe or filterable virus which could be shown to cause common colds.

From Time Magazine Archive

In 1905 Carre announced but did not prove that distemper is caused by a filterable virus.

From Time Magazine Archive

"What caused my clear spots," he wrote, "was in fact an invisible microbe, a filterable virus, but a virus parasitic on bacteria."

From Time Magazine Archive

Said the investigators: "The outbreak . . . was due to a filterable virus and spread through contact infection."

From Time Magazine Archive

Up to the present about twenty diseases are known to be due to a filterable virus, and among these are some of the most important for animals and for man.

From Disease and Its Causes by Councilman, William Thomas