Noun

(en noun)

A twenty-franc gold coin, once used in France

The foremost authority or leader in a given field

* 1893 ,

He [Professor Moriarty] is the Napoleon of crime, Watson.

* 2011 , Robert Morgan, Lions of the West: Heroes and Villains of the Westward Expansion

Always an eloquent speaker, Polk became known as the Napoleon of the stump.

* 1896 , J.S. Ogilvie, "A Biographical Sketch of William McKinley." The Life and Speeches of William McKinley.

He [William McKinley] has been called the Napoleon' of protection, as other men have been called ' Napoleons of finance.

(uncountable) The card game (nap)

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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.