Tricycle
In short
A three-wheeled vehicle that is powered by a person using their legs or arms. It is often used for balance or specialised transport.
In plain words
It is a bike with three wheels instead of two. This makes it much easier to stay upright without needing to balance.
A simple example
A child might use a small plastic tricycle to pedal around a garden. An adult might use a heavy-duty version to carry groceries.
Why it matters
They provide mobility for people who struggle with the balance required for a standard bicycle. They are also useful for transporting goods in tight spaces.
Easy to mix up
Do not confuse it with a unicycle, which has only one wheel.