I. noun Date: 1796 the stratum of weathered material that underlies the surface soil, II. transitive verb Date: 1840 to turn, break, or stir the ~ of, ~er noun
SUBSOIL
Meaning of SUBSOIL in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012