Longman Dictionary of Contemporary English homepage

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

leach

 verb
     
Related topics: Earth Sciences, Geology
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.
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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