leakage

[lee-kij] /ˈli kɪdʒ/
noun
1.
an act of leaking; leak.
2.
something that leaks in or out.
3.
the amount that leaks in or out.
4.
Commerce. an allowance for loss by leaking.
5.
Physics, Electricity. the loss of all or part of a useful agent, as of the electric current that flows through an insulator (leakage current) or of the magnetic flux that passes outside useful flux circuits (leakage flux)
Origin
1480-90; leak + -age
British Dictionary definitions for leakage current

leakage

/ˈliːkɪdʒ/
noun
1.
the act or an instance of leaking
2.
something that escapes or enters by a leak
3.
(commerce) an allowance made for partial loss (of stock, etc) due to leaking
4.
(physics)
  1. an undesired flow of electric current, neutrons, etc
  2. (as modifier): leakage current
Word Origin and History for leakage current

leakage

n.

late 15c., from leak (v.) + -age.