subirrigation
noun
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)
subirrigate
ˌsəb-ˈir-ə-ˌgāt
transitive verb 
Word History
First Known Use
1835, in the meaning defined above
- federal capital territory
- federal case
- federal chancellor
- federal council
- federal court
- federal deposit insurance
- federal district
- federal district court
- federal funds
- federal public law
- Federal Reserve agent
- Federal Reserve bank
- Federal Reserve Board
- Federal Reserve district
- Federal Reserve note
- Federal Reserve System
- federal theology
- Federal Way
- federalese
- federaleses
- federalisation
- federalisations
- federalise
- federalised
- federalises