[f. prec. + -ISM.]
1. Accidental manner. In Painting, The effect produced by accidental lights.
1851. Ruskin, Mod. Painters, I. II. 4. ii. § 4. 287. The constant habit of nature to … make the symmetry and beauty of her laws the more felt by the grace and accidentalism with which they are carried out.
2. Med. A system of medicine which regards disease as an accidental modification of health and preventible by the arrestment of external causes.
1879. Syd. Soc. Lex.
