Definition of punctuationism in US English:

punctuationism

noun

Biology
  • See punctuationist

    • ‘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).’
    • ‘In addition, when comparing the theories of gradualism with punctuationism, it is important to evaluate the theory of saltationism.’

Pronunciation

punctuationism

/-ˈāSHəˌnizəm/