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The Collaborative International Dictionary
Disprover

Disprover \Dis*prov"er\, n. One who disproves or confutes.

Wiktionary
disprover

n. One who disproves.

WordNet
disprover

n. a debater who refutes or disproves by offering contrary evidence or argument [syn: rebutter, refuter, confuter]

Usage examples of "disprover".

Physicists have perpetual motion machines, an army of amateur relativity disprovers, and perhaps cold fusion.