wadi

A valley, gully, or streambed in northern Africa and southwest Asia that remains dry except during the rainy season.

A stream that flows through such a channel.

An oasis.

The channel of a watercourse which is dry except in the rainy season; a watercourse; a stream: a term used chiefly in the topography of certain Eastern countries.

Gully or streambed in northern Africa and the Middle East that remains dry except during rainy season.