underdrain
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English[edit]
Etymology[edit]
Noun[edit]
underdrain (plural underdrains)
- An underground drain or trench with openings through which the water may percolate from the soil or ground above.
Verb[edit]
underdrain (third-person singular simple present underdrains, present participle underdraining, simple past and past participle underdrained)
- (transitive) To drain by forming an underdrain or underdrains in.