understratum
nounEtymology From under- + stratum.
1
The layer, or stratum, of earth on which the soil rests; the subsoil.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
noun
Etymology From under- + stratum.
The layer, or stratum, of earth on which the soil rests; the subsoil.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
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