basin (n.) Look up basin at Dictionary.com
"large shallow vessel or dish used chiefly to hold water or other liquid," c. 1200, from Old French bacin (11c., Modern French bassin), from Vulgar Latin *baccinum (source also of Spanish bacin, Italian bacino), from *bacca "water vessel," perhaps originally Gaulish (but OED dismisses the proposed Celtic cognates on sense grounds). Meaning "large-scale artificial water-holding landscape feature" is from 1712. Geological sense of "tract of country drained by one river or draining into one sea" is from 1830.