Source : Webster's Revised Unabridged Dictionary (1913)

Dependency \De*pend"en*cy\, n.; pl. {Dependencies}.
   1. State of being dependent; dependence; state of being
      subordinate; subordination; concatenation; connection;
      reliance; trust.

            Any long series of action, the parts of which have
            very much dependency each on the other. --Sir J.
                                                  Reynolds.