eluviation
noun
elu·vi·a·tion (ˌ)ē-ˌlü-vē-ˈā-shən 
: the transportation of dissolved or suspended material within the soil by the movement of water when rainfall exceeds evaporation
eluvial
ē-ˈlü-vē-əl
adjective eluviated
ē-ˈlü-vē-ā-təd
adjective 
Word History
Etymology
eluvial of eluviation (from e- + -luvial—as in alluvial) + -ation
First Known Use
1899, in the meaning defined above