'Understratum' definitions:

Definition of 'Understratum'

From: GCIDE
  • Understratum \Un"der*stra`tum\, n.; pl. L. Understrata, E. Understratums. The layer, or stratum, of earth on which the mold, or soil, rests; subsoil. [1913 Webster]

Words containing 'Understratum'