bolson

== English == === Etymology === From Spanish bolso (“a large pouch”). === Noun === bolson (plural bolsons) (chiefly southwestern US) A relatively flat and arid valley that is surrounded by mountains and that drains into a central basin. 1974, U.S. Department of the Interior, Geological Survey Research Professional Paper 900, p. 120 (Google preview): In three separate bolsons in West Texas, electrical-resistivity soundings and seismic-refraction profiles have been used . . . to estimate the alluvium thickness and ground-water quality. === Further reading === “bolson”, in OneLook Dictionary Search. === Anagrams === SNOBOL, bolons, lob-ons