While researching an article, Dr Stephen Hughes, from the University of Technology in Brisbane, noticed the definition for the word "siphon" was wrong.
The physics lecturer saw the famous dictionary stated it's atmospheric pressure makes siphons work, when (as we all know) it's the force of gravity.
Hughes says he was shocked to have spotted the error and quickly fired off a letter to OED to point out the mistake.
A spokesperson for the Oxford English Dictionary said the error was introduced in 1911 but it would be fixed in the next edition… they also said Dr Hughes's letter was perfectly written.