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Stratum vs Understratum - What's the difference?

stratum | understratum |

As nouns the difference between stratum and understratum

is that stratum is one of several parallel horizontal layers of material arranged one on top of another while understratum is the layer, or stratum, of earth on which the soil rests; the subsoil.

stratum

English

Noun

(strata)
  • One of several parallel horizontal layers of material arranged one on top of another.
  • (geology) A layer of sedimentary rock having approximately the same composition throughout.
  • Any of the regions of the atmosphere, such as the stratosphere, that occur as layers.
  • (biology) A layer of tissue.
  • A class of society composed of people with similar social, cultural, or economic status.
  • (ecology) A layer of vegetation, usually of similar height.

    • Synonyms

    * (layers of material arranged one on top of another) tier

    Related terms

    * stratification * stratify * stratosphere

    External links

    * (wikipedia "stratum") * * English nouns with irregular plurals ----

    understratum

    English

    Noun

    (understrata)
  • The layer, or stratum, of earth on which the soil rests; the subsoil.