The etymology of the word "eletricas" is related to the Portuguese word "elétricas", which translates to "electric" in English. The Portuguese term itself derives from the Latin word "electricum", meaning "pertaining to amber". The term "electricum" originated from the Greek word "ēlektron", which referred to amber. Amber was observed to generate static electricity when rubbed, hence giving rise to the connection of the concept of electricity with the term "electricum" and its subsequent evolution into "elétricas" in Portuguese.