adjective. Of, relating to, or caused by a virus.

adjective. Of or relating to the propagation of information, ideas, or trends by means of social networks rather than conventional mass media.

adjective. Of or relating to a biological virus.

adjective. Caused by a virus.

adjective. Of the nature of an informatic virus; able to spread copies of itself to other computers.

adjective. Spread by word of mouth, with minimal intervention in order to create buzz and interest.

noun. A video, image or text spread by "word of mouth" on the internet or by e-mail for humorous, political or marketing purposes.

adjective. relating to or caused by a virus

"People have been sharing movie trailers online before the term "viral video" even existed, and trailers are shared more than twice as often as other video content!"

go viral  viral marketing  

antiviral  spiral  

airborne  autoimmune  bacterial  biological  cellular