Definition of punctuationism in US English:

punctuationism

noun

Biology
  • See punctuationist

    • ‘In addition, when comparing the theories of gradualism with punctuationism, it is important to evaluate the theory of saltationism.’
    • ‘Punctuated equilibrium is commonly contrasted against the theory of phyletic gradualism, which states that evolution generally occurs uniformly and by the steady and gradual transformation of whole lineages (anagenesis).’

Pronunciation

punctuationism

/-ˈāSHəˌnizəm/