Eureka (word)
The exclamation 'Eureka!' is attributed to the ancient Greek scholar Archimedes. He reportedly proclaimed "Eureka! Eureka!" after he had stepped into a bath and noticed that the water level rose, whereupon he suddenly understood that the volume of water displaced must be equal to the volume of the part of his body he had submerged. (This relation is "not" what is known as Archimedes' principle—that deals with the "upthrust" experienced by a body immersed in a fluid.) He then realized that the volume of irregular objects could be measured with precision, a previously intractable problem. He is said to have been so eager to share his discovery that he leapt out of his bathtub and ran naked through the streets of Syracuse.
Mundaka
Others have related the name "Mundaca" to a stock of Basque toponyms with the endings "-aka", "-eka", "-ika", which are especially abundant in Biscay and which can be linked with the Celto-Italic suffix "-aka". To some the origin of the name would be much older and it could be traced back to an era in which Vizcaya could have been populated by a Celtic people.