developmentalist

[ dih-vel-uh p-men-tl-ist ]
/ dɪˌvɛl əpˈmɛn tl ɪst /

noun

an expert in or advocate of developmental psychology.

Origin of developmentalist

First recorded in 1860–65; developmental + -ist
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019