ontogenesis

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

noun (biology) the process of an individual organism growing organically; a purely biological unfolding of events involved in an organism changing gradually from a simple to a more complex level

From onto- + -genesis.

But ontogenesis would have furnished us with facts no less cogent. — Creative Evolution, Bergson, Henri
By itself, however, analogy must not be conclusive; in the matter under consideration it cannot be regarded as proof; and alone this rule of ontogenesis and phylogenesis is not enough to bridge the chasm and allow one to describe prehistoric poetry. — The Beginnings of Poetry, Francis Barton Gummere

growth, growing, maturation, development, ontogeny

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