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Definition of Strata:

  1. In geol., a bed; a layer; a great extent of rock or other earthy substance lying in the crust of the earth in a flattish form, varying from a few inches to many yards in depth.
  2. The plu. of stratum, which see.


elves, genera, calves, indices, geese, corpora, children, hooves, feet, halves.

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