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WordReference Random House Unabridged Dictionary of American English © 2024he•red•i•tar•i•an (hə red′i târ′ē ən),USA pronunciation n. - Geneticsa person who believes that differences between individuals or groups, including moral and intellectual attributes, are predominantly determined by genetic factors (opposed to environmentalist).
adj. - Geneticscharacteristic of or based on such belief:hereditarian theories.
- heredit(y) or heredit(ary) + -arian 1880–85
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