A bicycle is a two-wheeled vehicle that is powered by pedaling. It typically has handlebars for steering, a seat for the rider, and can be used for transportation, recreation, and exercise. Bicycles come in various designs, including road bikes, mountain bikes, and hybrid bikes.
The word "bicycle" comes from the prefix "bi-" meaning "two," and "cycle," which comes from the Greek word "kyklos," meaning "circle" or "wheel." It was first used in the 19th century to describe the two-wheeled vehicle that we know today.