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The study of the shape and protuberances of the skull, based on the now discredited belief that they reveal character and mental capacity.
phren′o·log′ic (frĕn′ə-lŏj′ĭk, frē′nə-), phren′o·log′i·cal (-ĭ-kəl) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.