What is Bicycle ?
Bicycle is (noun) a vehicle with two wheels which is ridden by one person who makes it go by pushing on the pedals and steers with the handlebars He goes to school by bicycle every day. She’s going to do the shopping on her bicycle. He’s learning to ride a bicycle. Synonym bike ((verb)) to ride on a bicycle We bicycled all over the Netherlands. (NOTE: The person who rides a bicycle is a cyclist. To show the difference from a motorcycle, a bicycle is sometimes called a push bike.)
source: Easier English, Student Dictionary Upper Intermediate Level