Synonyms: adventitious
Definition: associated by chance and not an integral part
Usage: poetry is something to which words are the accidental, not by any means the essential form- Frederick W. Robertson; they had to decide whether his misconduct was adventitious or the result of a flaw in his character
Similar words: extrinsic
Definition: not forming an essential part of a thing or arising or originating from the outside
Usage: extrinsic evidence; an extrinsic feature of the new building; that style is something extrinsic to the subject; looking for extrinsic aid