Longman Dictionary of Contemporary English homepage

Topic: GEOLOGY

Language: Old English
Origin: leccan 'to make wet'

leach

verb
     
leach also leach out [intransitive and transitive]
technicalHE if a substance leaches or is leached from a larger mass such as the soil, it is removed from it by water passing through the larger mass:
The manufacturers say that there is no danger of the aluminium leaching into the water.
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