ultravirus Hear it!

ultravirus definition

ultra·vi·rus (ul′trə vī′rəs)

noun

an ultramicroscopic virus, so small as to pass through the pores of the finest filter

Etymology: ModL: see ultra- & virus

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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