- 1. n. The hard substratum. Same as Hard pan, under Hard, a. Source: opted
- 2. n. crust or layer of hard subsoil encrusted with calcium-carbonate occurring in arid or semiarid regions Source: wordnet
- 3. n:100 n crust or layer of hard subsoil encrusted with calcium-carbonate occurring in arid or semiarid regions Source: ecdict
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hardpan
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