"Eureka" is an exclamation used to express triumph or discovery. It is often associated with moments of sudden realization or insight, where a person finds a solution to a problem or uncovers new information. The term is derived from the ancient Greek word "heurēka," meaning "I have found it." The phrase is famously attributed to the ancient Greek mathematician and inventor Archimedes. According to legend, he shouted "Eureka!" after discovering a method to determine the purity of gold while taking a bath. This moment of inspiration has since become a symbol of scientific discovery and innovation.