Main Entry: in·suf·fi·cien·cy

Pronunciation: \ˌin(t)-sə-ˈfish-ən-sē\

Function: noun

Inflected Form(s): plural in·suf·fi·cien·cies

: the quality or state of not being sufficient: as a : lack of adequate supply of something <an insufficiency of vitamins> b : lack of physical power or capacity ; especially : inability of an organ or bodily part to function normally <renal insufficiency> <pulmonary insufficiency>—compare aortic regurgitation

—in·suf·fi·cient \-ənt\ adjective