il·lu·vi·a·tion ( -l  v -  sh n)n. The deposition in an underlying soil layer of colloids, soluble salts, and mineral particles leached out of an overlying soil layer. |
illuviation [ɪˌluːvɪˈeɪʃən]
n
(Earth Sciences / Geological Science) the process by which a material (illuvium), which includes colloids and mineral salts, is washed down from one layer of soil to a lower layer
[from Latin illuviēs dirt, mud, from il- + -luviēs, from lavere to wash]
illuvial adj
| illuviation (-lv-shn) The deposition of colloids, soluble salts, and suspended mineral particles in a lower soil horizon through the process of eluviation (downward movement) from an upper soil horizon. |
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