peripheralist
/pɪˈrɪf(ə)rəlɪst/ /pɪˈrɪf(ə)r(ə)lɪst/Chiefly Psychology
noun
A believer in or advocate of peripheralism; a person who stresses the importance of peripheral factors.
adjective
Of or relating to peripheralists or peripheralism.
Origin
1920s; earliest use found in Journal of Philosophy. From peripheral + -ist, after peripheralism.