Coming to full development; becoming mature. Synonyms:maturement, ripening.
2.
(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. Synonyms:development, growing, growth, ontogenesis, ontogeny.Antonym:nondevelopment.
3.
(medicine) the formation of morbific matter in an abscess or a vesicle and the discharge of pus. Synonyms:festering, suppuration.
... allelomorphic factors are not the only ones which are segregated into different germ-cells, at the maturation of the cell; for the factors which are not alternative are likewise distributed, more or less independently of each other, so that it is largely a matter of chance whether factors which enter a cross in the same germ-cell, segregate into ... — Applied Eugenics • Paul Popenoe and Roswell Hill Johnson