Definition of punctuated equilibrium in English:

punctuated equilibrium

Syllabification: punc·tu·at·ed e·qui·lib·ri·um

noun

Biology
  • The hypothesis that evolutionary development is marked by isolated episodes of rapid speciation between long periods of little or no change.
    More example sentences
    • We performed the analysis assuming two evolutionary models: Brownian motion and punctuated equilibrium or speciation.
    • I didn't mention punctuated equilibrium or allopatric speciation either, because it isn't relevant to the matter at hand.
    • Their views are commonly known as the theory of punctuated equilibrium and contrasted with evolutionary gradualism.

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Word of the day coloratura
Pronunciation: ˌkələrəˈto͝orə
noun
elaborate ornamentation of a vocal melody