- another word for
subsoil 1a
WordReference Random House Unabridged Dictionary of American English © 2025
un•der•soil
(un′dər soil′),USA pronunciation n.
- Agriculture, Geologysubsoil.
- under- + soil1 1700–10
Collins Concise English Dictionary © HarperCollins Publishers::
'undersoil' also found in these entries (note: many are not synonyms or translations):