plural of drainage basin

plural of basin of attraction

(mathematics, physics) Informally, a set of points from which a dynamical system spontaneously moves to a particular attractor.

(dated) A container used for urinating or defecating when it is impossible or inconvenient to go to a bathroom or toilet; a bedpan, a chamber pot. Commonly used in hospitals, where it is normally called bedpan. Formerly used in private residences, particularly those without an indoor toilet or bathroom.

A depression in the ground designed to fill with rainwater that would otherwise cause flooding

A large arid area of the western United States of America.

plural of catchment basin

(geography) An endorheic basin in China's northwest Xinjiang province occupying an area of about 906,500 km2 (350,000 sq mi).

plural of river basin

A facility to catch debris flows, to trap vegetative and sedimentary debris, such as gravel, boulders, branches, trunks; but allow water to drain; to prevent destruction from debris inundation and surge front downstream.