From Wiktionary, the free dictionary
From stream + -wise.
streamwise (not comparable)
- In the direction of a stream
1976, Ian Naismith Sneddon, Encyclopaedic Dictionary of Mathematics for Engineers and Applied Scientists[1], →ISBN, page 9:AEROFOIL. The name given to the lifting wing or, more correctly, to the shape of a streamwise section through such a wing.