substratum

Other forms: substratums

Definitions of substratum
  1. noun
    any stratum or layer lying underneath another
    synonyms: substrate
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    type of:
    stratum
    one of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock)
  2. noun
    a surface on which an organism grows or is attached
    synonyms: substrate
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    type of:
    surface
    the extended two-dimensional outer boundary of a three-dimensional object
  3. noun
    an indigenous language that contributes features to the language of an invading people who impose their language on the indigenous population
    synonyms: substrate
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    type of:
    indigenous language
    a language that originated in a specified place and was not brought to that place from elsewhere
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