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phi·los·o·pher (fĭ-lŏsə-fər)
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n.
1. A student of or specialist in philosophy.
2. A person who lives and thinks according to a particular philosophy.
3. A person who is calm and rational under any circumstances.
[Middle English philosophre, from alteration of Old French philosophe, from Latin philosophus, from Greek philosophos, lover of wisdom, philosopher : philo-, philo- + sophiā, knowledge, learning.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
 

Indo-European & Semitic Roots Appendices

    Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

    Indo-European Roots

    Semitic Roots

    The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.

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