From flashlights to courtrooms, "battery" has surprising meanings. Explore its electrifying etymology and diverse uses in our glossary.

Unpack "ECU"—from your car's brain to historic coins and defunct European currency units. Our glossary entry explores its diverse meanings, origins, and real-world examples.

Explore "engineer": from its Latin root for "cleverness" to its 14th-century military origins, this entry delves into its evolving meanings, modern definitions, real-world examples, and variations.