Tanım: a fruit which develops from a carpel and at maturity comprises a dry exocarp, dry mesocarp, and dry endocarp that are elongated into a wing-like structure.
Tanım: A depression caused by erosion by water or ice. Low-lying land bordered by higher ground; especially elongate, relatively large gently sloping depressions of the Earth's surface, commonly situated between two mountains or between ranges of hills or mountains, and often containing a stream with an outlet.