sub·ir·ri·ga·tion
ˌsəb-ˌir-ə-ˈgā-shən 
: irrigation below the surface (as by a periodic rise of the water table or by a system of underground porous pipes)
sub·irrigate
"+
: to water from beneath (as by the periodic rise of a water table)
especially
: to irrigate below the surface (as by a system of underground porous pipes)
Cite this Entry
“Subirrigation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/subirrigation. Accessed 18 Jun. 2026.
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