
1) American art movement
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https://www.crosswordclues.com/clue/accidentalism
[medicine] In medicine, accidentalism was the idea that disease is only an accidental modification of the healthy condition, and can, therefore, be avoided by modifying external conditions. ...
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http://en.wikipedia.org/wiki/Accidentalism_(medicine)
[painting] In painting, accidentalism is the effect produced by accidental lights. ...
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http://en.wikipedia.org/wiki/Accidentalism_(painting)
[philosophy] In philosophy, accidentalism denies the causal closure of physical determinism and maintains that events can succeed one another haphazardly or by chance (not in the mathematical but in the popular sense). Opponents of accidentalism maintain that what seems to be a chance occurrence is actually the result of one or more causes ...
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http://en.wikipedia.org/wiki/Accidentalism_(philosophy)

theory that events do not have causes
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http://phrontistery.info/a.html

• (n.) Accidental character or effect.
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http://thinkexist.com/dictionary/meaning/accidentalism/
Ac`ci·den'tal·ism noun Accidental character or effect.
Ruskin. Found on
http://www.encyclo.co.uk/webster/A/13

any system of thought which denies the causal nexus and maintains that events succeed one another haphazardly or by chance (not in the mathematical but in the popular sense). In metaphysics, accidentalism denies the doctrine that everything occurs or results from a definite cause. In this connection it is synonymous with tychism (ruxi, chance), a t...
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http://www.translationdirectory.com/glossaries/glossary131.htm

The theory that some events are undetermined, or that the incidence of series of determined events is unpredictable (Aristotle, Cournot). In Epicureanism (q.v.) such indeterminism was applied to mental events and specifically to acts of will. The doctrine then assumes the special form: Some acts of will are unmotivated. See Indeterminism. A striki....
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https://www.encyclo.co.uk/local/21203

a system of medicine based on the symptoms of a disease, disregarding its origin or cause. · any theory holding that some events have no causes.
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https://www.infoplease.com/dictionary/accidentalism
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