An ait (/eɪt/, like eight) or eyot (/aɪ(ə)t, eɪt/) is a small island. It is especially used to refer to river islands found on the River Thames and its tributaries in England. Aits are typically formed by the deposit of sediment in the water, which accumulates. An ait is characteristically long and narrow, and may become a permanent island should it become secured and protected by growing vegetation. However, aits may also be eroded: the resulting sediment is deposited further downstream and could result in another ait. A channel with numerous aits is called a braided channel.
