The Collaborative International Dictionary
Dependancy
Dependant \De*pend"ant\, Dependance \De*pend"ance\, n., Dependancy \De*pend"an*cy\, n. See Dependent, Dependence, Dependency.
Note: The forms dependant, dependance, dependancy are from the French; the forms dependent, etc., are from the Latin. Some authorities give preference to the form dependant when the word is a noun, thus distinguishing it from the adjective, usually written dependent.
Douglas Harper's Etymology Dictionary
dependancy
early variant of dependency, rare since c.1800; see -ance.
Wiktionary
dependancy
n. (archaic form of dependency English)
Usage examples of "dependancy".
Its intention is to isolate application programs from any type of hardware dependancies.