Understratum definition

ŭndər-strātəm, -strătəm
Frequency:
A substratum.
noun
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A substratum.
noun
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The layer, or stratum, of earth on which the soil rests; the subsoil.
noun
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Other Word Forms

Noun

Singular:
understratum
Plural:
understrata

Origin of understratum

  • under- +"Ž stratum

    From Wiktionary