drainage_basin
1. [ noun ] (geography) the geographical area draining into a river or reservoir
Synonyms: catchment_basin drainage_area catchment_area
Related terms: geographical_area
Similar spelling:   drainage_area
  drawing_pin
  drawing_ink
  drainage_ditch
  drawing_string
  drainage_system
  drawing_card
  drawing_table
  drawing_paper
  drawing_lots