Webster dictionary was developed by Noah Webster in the beginning of 19th century. On this website, you can find definition for Understratum from the 1913 edition of Webster's Revised Unabridged Dictionary. Define Understratum using one of the most comprehensive free online dictionaries on the web.

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Understratum
Part of Speech: noun
Results: 1
1. The layer, or stratum, of earth on which the mold, or soil, rests; subsoil.
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