[¦ag·rə¦kəl·chə·rəl ‚pīp ‚drān] (civil engineering) A system of porous or perforated pipes laid in a trench filled with gravel or the like; used for draining subsoil.
agricultural pipe drain
A system of porous or perforated pipes laid in a trench filled with gravel (or the like); used for draining subsoil.