1. of, relating to, or resembling a basin; having the form or characteristics of a basin
Usage: technical; geology
2. of or relating to a drainage basin or watershed
Usage: technical; hydrology

Examples

• The basinal structure of the valley made it ideal for water collection.
• Geologists studied the basinal deposits to understand the region's geological history.
• The basinal area receives runoff from the surrounding highlands.
• Basinal sediments accumulated over millions of years in this depression.