Ea

From The Anglish Moot

An ea is a flow of water over land, from the highest fells into the sea. The longest ea on Earth is either the Amazon ea or the Nile ea, hingeing on how they are meted. The longest in England is the Severn ea.

Eas are fed by water from elsewhere, such as a mere, a spring, or a deal of smaller streams known as headwaters.