D defs.my
Entry 1 sense Webster, 1913

Tychism

· Ty·chism · IPA
01 n. Any theory which conceives chance as an objective reality; esp., a theory of evolution which considers that variation may be purely fortuitous.
  1. 1.
    Any theory which conceives chance as an objective reality; esp., a theory of evolution which considers that variation may be purely fortuitous.