cou·lee 
(klē)
(klē)n.
1. Western US A deep gulch or ravine with sloping sides, often dry in summer.
2. Louisiana & Southern Mississippi
a. A streambed, often dry according to the season.
b. A small stream, bayou, or canal.
3. Upper Midwest A valley with hills on either side.
4.
a. A stream of molten lava.
b. A sheet of solidified lava.
[Canadian French coulée, from French, flow, from couler, to flow, from Latin cōlāre, to filter, from cōlum, sieve.]