n. pl. e·piph·y·ses (-sēz′)
1. The end of a long bone that is originally separated from the main bone by a layer of cartilage but later becomes united to the main bone through ossification.
2. See pineal gland.
[Greek epiphusis, an excrescence : epi-, epi- + phusis, growth; see bheuə- in the Appendix of Indo-European roots.]
ep′i·physi·al (ĕp′ə-fĭzē-əl), ep′i·physe·al adj.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 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:
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.