Definition of illuviation in English:

illuviation

noun

mass nounSoil Science
  • The introduction of salts or colloids into one soil horizon from another by percolating water.

    • ‘Clay illuviation is the process that has been most exhaustively considered in micromorphological studies.’
    • ‘The study also indicates that the illuviation of clay particles and their subsequent accumulation in the Bt horizons have occurred in sodic environment.’

Origin

Early 20th century: from il- ‘in’ + -luvial (on the pattern of alluvial) + -ation.

Pronunciation

illuviation

/ɪˌl(j)uːvɪˈeɪʃ(ə)n/