As nouns the difference between terms and illuvium
is that terms is while illuvium is (geology) material displaced across a soil profile, from one layer to another, by the action of rainwater.
terms
English
Noun
(head)
Statistics
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illuvium
English
Noun
(
en-noun)
(
wikipedia illuvium)
(geology) material displaced across a soil profile, from one layer to another, by the action of rainwater