from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A crude sodium nitrate occurring naturally in Chile, Peru, and the southwest United States, used as fertilizer.
- n. See sodium nitrate.
- n. See hardpan.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A crude form of sodium nitrate from South America; used as a fertilizer.
- n. A layer of hard clay subsoil; hardpan.
from the GNU version of the Collaborative International Dictionary of English
- n. a deposit of sand or clay on the surface containing crystallized salts such as sodium chloride or sodium nitrate; -- used especially of the sodium nitrate deposits of Chile and Peru.
- n. a stratum of calcium carbonate in the soil of an arid or semiarid region.
from The Century Dictionary and Cyclopedia
- n. The local South American name of the native impure nitrate of soda (Chili saltpeter), of much importance in the commerce of South America.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. nitrate-bearing rock or gravel of the sodium nitrate deposits of Chile and Peru
- n. crust or layer of hard subsoil encrusted with calcium-carbonate occurring in arid or semiarid regions
American Spanish, from Spanish, pebble in a brick, flake of lime, from cal, lime, from Latin calx, calc-, lime; see calx.(American Heritage® Dictionary of the English Language, Fourth Edition)