A harmful result.

Change in morphology, physiology, growth development or lifespan of an organism which results in impairment of functional capacity or which increases susceptibility to the harmful effects of other environmental influences. (after IPCS, 1978)

An unintended, but not necessarily unexpected, result of therapy or other intervention that is unpleasant or dangerous.

an anterior concha scar that, with careful placement, is inconspicuous

an inconspicuous effacement or elevation of the superior auricular sulcus

A term that may apply to a property which is on or eligible for the National Register of Historic Places, adverse affect refers to the diminishment of a property's integrity, with respect to its location, design, setting, materials, workmanship, feeling, or association. The term is applied by federal agency officials, in consultation with the State (or Tribal) Historic Preservation Officer, as part of the Section 106 process.

A change in body function or the structures of cells that can lead to disease or health problems.

How a student's disability negatively affects his/her ability to function successfully with educational tasks. This must be: to a marked degree; not correctable through using classroom accommodations and supplementary aids and services; persist over an extended period of time; and require special education services.

a reaction which "results in death, disability, hospitalization, is life-threatening, causes a congenital anomaly, or requires treatment to prevent permanent damage