phre·nol·o·gy 
(frĭ-nŏlə-jē)
(frĭ-nŏlə-jē)n.
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·logic (frĕn′ə-lŏjĭk, frē′nə-), phren′o·logi·cal (-ĭ-kəl) adj.
phre·nolo·gist n.