Goto next slide"Referendum"

When:

Lookups spiked on November 1, 2011.

Why:

World financial markets were thrown into confusion when the Greek Prime Minister announced a surprise decision to hold a referendum on the bailout conditions offered by eurozone countries.

Referendum means "a public vote on a particular issue" and comes from the Latin verb that means "to refer."

(Later in the week, the referendum was cancelled after all.)