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Noun: ontogenesis  ,ón-tu'je-nu-sis
  1. (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
    "he proposed an indicator of osseous ontogenesis in children";
    - growth, growing, maturation, development, ontogeny

Type of: biological process, organic process

Encyclopedia: Ontogenesis