Definition of gracilization in English:
gracilization
(also gracilisation)
noun ˌɡrasɪlʌɪˈzeɪʃnˌɡras(ə)lʌɪˈzeɪʃn
Anthropology The (evolutionary) process of becoming thinner or more gracile.
Origin
1950s; earliest use found in Acta Palaeontologica Polonica. From gracile + -ization, after Russian gracilizacija.