Flowing outwards, used in geography for rivers with a mouth over the sea. From Greek 949; 958; 969; ( exo "outside, outside") 961; 949; 953; 957; ( rein "flow" ) .
The correct term is exorrenic, with tilde. It means they flow outward, they go outwards or out to sea. It is a term used in Geology, to designate the streams of water that drain into the sea.