maturation

/M AE0 CH ER0 EY1 SH AH0 N/
noun
  1. 1

    The process of becoming mature.

  2. 2

    The process of differentiation that produces the adult form of an organism.

  3. 3

    The process of maturating, or suppurating fully.

Source: https://en.wiktionary.org/wiki/maturation