Noun caliche has 2 senses
  1. caliche, hardpan - crust or layer of hard subsoil encrusted with calcium-carbonate occurring in arid or semiarid regions
    --1 is a kind of soil, dirt
  2. caliche - nitrate-bearing rock or gravel of the sodium nitrate deposits of Chile and Peru
    --2 is a kind of
    rock, stone
,
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