Search Result for "undersoil": 
Wordnet 3.0

NOUN (1)

1. the layer of soil between the topsoil and bedrock;
[syn: subsoil, undersoil]



The Collaborative International Dictionary of English v.0.48:

Undersoil \Un"der*soil`\, n.
   The soil beneath the surface; understratum; subsoil.
   [1913 Webster]


WordNet (r) 3.0 (2006):

undersoil
    n 1: the layer of soil between the topsoil and bedrock [syn:
         subsoil, undersoil]