complication

n. [ L. compliasion: cf. F. complication. ] 1. The act or process of complicating; the state of being complicated; intricate or confused relation of parts; entanglement; complexity. [ 1913 Webster ]

A complication of diseases. Macaulay. [ 1913 Webster ]

Through and beyond these dark complications of the present, the New England founders looked to the great necessities of future times. Palfrey. [ 1913 Webster ]

2. (Med.) A disease or diseases, or adventitious circumstances or conditions, coexistent with and modifying a primary disease, but not necessarily connected with it. [ 1913 Webster ]