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conceptionist

noun
con·​cep·​tion·​ist | \ -sh(ə)nə̇st\
plural -s

Definition of conceptionist

1 : conceptualist
2 capitalized, [ (Immaculate) Conception + -ist ] Roman Catholicism : a member of any of the various orders or congregations dedicated to and named in honor of the Immaculate Conception

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