Noun

(en noun)

Any of a series of Soviet unmanned space satellites, especially the first one in 1957.

* 2011 January 25, Barack Hussein Obama II, Jon Favreau (speechwriter), State of the Union , United States House of Representatives:

Half a century ago, when the Soviets beat us into space with the launch of a satellite called Sputnik'¸ we had no idea how we’d beat them to the moon. The science wasn’t there yet. NASA didn’t even exist. But after investing in better research and education, we didn’t just surpass the Soviets; we unleashed a wave of innovation that created new industries and millions of new jobs. This is our generation’s ' Sputnik moment.

Noun

(en-noun) (wikipedia virus) (Virus)

(archaic) Venom, as produced by a poisonous animal etc.

(pathology, microbiology, virology) A submicroscopic, non-cellular structure consisting of a core of DNA or RNA surrounded by a protein coat, that requires a living host cell to replicate, and often causes disease in the host organism.

* {{quote-magazine, year=2013, month=May-June, author= Katie L. Burke

, title= In the News , volume=101, issue=3, page=193, magazine=(American Scientist) , passage=Bats host many high-profile viruses that can infect humans, including severe acute respiratory syndrome and Ebola.}}

* 2001 , Leslie Iversen, Drugs: A Very Short Introduction (Oxford 2001, p. 64)

Viruses are the smallest and most simplified forms of life.

A disease caused by these organisms.

(computing) A program which can covertly transmit itself between computers via networks (especially the Internet) or removable storage such as CDs, USB drives, floppy disks, etc., often causing damage to systems and data; also computer virus.