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Từ điển WordNet v3.1 - WordNet Dictionary
caliche
1. crust or layer of hard subsoil encrusted with calcium-carbonate occurring in arid or semiarid regions
• Syn:
hardpan
• Hypernyms:
soil, dirt
2. nitrate-bearing rock or gravel of the sodium nitrate deposits of Chile and Peru
• Hypernyms:
rock, stone
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