Wiktionary
essentialist
a. Of or pertaining to essentialism n. An advocate of essentialism
Usage examples of "essentialist".
Dominici has been condemned: descending from the charming empyrean of bourgeois novels and essentialist psychology, Literature has just condemned a man to the guillotine.
I have tried to keep a sharp vigil against the muddling results of an essentialist sexuality.
In response, they had founded the New Essentialists Movement and tried to show people the error of their ways.