Virus - Definition
virus
n 1: (virology) ultramicroscopic infectious agent that
replicates itself only within cells of living hosts; many
are pathogenic; a piece of nucleic acid (DNA or RNA)
wrapped in a thin coat of protein
2: a harmful or corrupting agency; "bigotry is a virus that must
not be allowed to spread"; "the virus of jealousy is latent
in everyone"
3: a software program capable of reproducing itself and usually
capable of causing great harm to files or other programs on
the same computer; "a true virus cannot spread to another
computer without human assistance" [syn: virus, computer
virus]