sub·vi·rus (sŭb-vī'rəs) n.
pl.sub·vi·rus·es A viral protein or other substance smaller than a virus and having some of the properties of a virus. sub·vi'ral (-rəl) adj.
Main Entry: sub·vi·ral Pronunciation: "s&b-'vI-r&l Function: adjective : relating to, being, or caused by a piece or a structural part(as a protein) of a virus <subviral infection>