underdrain

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English[edit]

Etymology[edit]

under- +‎ drain

Noun[edit]

underdrain (plural underdrains)

  1. 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)

  1. (transitive) To drain by forming an underdrain or underdrains in.

Related terms[edit]