̷ ̷ˌ ̷ ̷ ̷ ̷ˈmȯrfəsə̇s sometimes -ˌmȯrˈfōsə̇s noun
( -es )
Etymology: New Latin, from geront- + -morphosis
1. : phylogenetic change involving specialization of the characters of adult organisms and accompanied by decreased capacity for further change
2. : tendency toward racial senescence — compare fetalization , paedomorphosis