polyhistoric
pol·y·his·tor
(pŏl′ē-hĭs′tər)n.
A person with broad knowledge.
[Latin Polyhistōr, from Greek poluistōr, very learned : polu-, poly- + histōr, learned; see weid- in Indo-European roots.]
pol′y·his·tor′ic (-hĭ-stôr′ĭk) 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.
polyhistoric
(ˌpɒlɪhɪˈstɒrɪk)adj
(Education) formal relating to a polyhistor
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014