·add. ·- A system of natural drainage developed by the constituent streams through headwater erosion.
·adj Relating to autogenesis; self-generated. II. Autogenetic ·add. ·adj Pertaining to, controlled ...
Webster's Dictionary of the English Language
·noun Area or district drained; as, the drainage of the Po, the Thames, ·etc. II. Drainage ·noun Th...
·add. ·- A system of land forms produced by the free action of rain and streams on rocks of uniform ...
·- The draining off of water. ...