underdrain
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.