falsification

Concise Oxford English Dictionary © 2008 Oxford University Press:
falsify /ˈfɔːlsɪfʌɪ, ˈfɒls-/

▶verb (falsifies, falsifying, falsified)

• 1 alter (information or evidence) so as to mislead.

• 2 prove (a statement or theory) to be false.

– derivatives
falsifiability noun,
falsifiable adjective,
falsification noun.

– origin ME: from Fr. falsifier or med. L. falsificare, from L. falsificus ‘making false’, from falsus ‘false’.