Definition of "etiological" [e•ti•o•log•ic•al]

• Of or pertaining to an etiology. (adjective)

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• "Indeed, it is not at all clear whether there may in fact be an etiological link between fibromyalgia and obesity."
• "So compelling are these findings that Dr. Itzhaki has concluded, Our present data suggest that this virus is a major cause of amyloid plaques and hence probably a significant etiological factor in Alzheimer's disease."
• "The collective efforts by researchers in our group and others, and by clinicians, brought together sufficient data to convince the scientific community and the relevant authorities that LAV (later to be named human immunodeficiency virus, HIV) was the etiological agent of AIDS."