epiph·​y·​sis | \ i-ˈpi-fə-səs How to pronounce epiphysis (audio) \
plural epiphyses\ i-​ˈpi-​fə-​ˌsēz How to pronounce epiphysis (audio) \

Definition of epiphysis

1 : a part or process of a bone that ossifies separately and later becomes ankylosed to the main part of the bone especially : an end of a long bone

Examples of epiphysis in a Sentence

Recent Examples on the Web Meanwhile, the epiphyses on the ischium and the ends of the femur and shin bone (tibia) were well-developed but hadn’t yet fused—in other words, DH7 wasn’t a very young child but was definitely still growing. Kiona N. Smith, Ars Technica, 10 Apr. 2020 Vidyadhar Upasani, a pediatric orthopedist at Rady Children’s Hospital in San Diego, uses 3-D printing to help plan intricate bone procedures to treat, for example, slipped capital femoral epiphysis, the most common hip disorder in adolescents. Erin Blakemore, Washington Post, 11 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'epiphysis.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of epiphysis

1634, in the meaning defined at sense 1

History and Etymology for epiphysis

New Latin, from Greek, growth, from epiphyesthai to grow on, from epi- + phyesthai to grow, middle voice of phyein to bring forth — more at be

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The first known use of epiphysis was in 1634

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Dictionary Entries Near epiphysis

epiphyseal separation



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Cite this Entry

“Epiphysis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/epiphysis. Accessed 26 Jun. 2022.

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More Definitions for epiphysis


epiph·​y·​sis | \ i-ˈpif-ə-səs How to pronounce epiphysis (audio) \
plural epiphyses\ -​ˌsēz How to pronounce epiphysis (audio) \

Medical Definition of epiphysis

1 : a part or process of a bone that ossifies separately and later becomes ankylosed to the main part of the bone especially : the usually rounded end of the shaft of a long bone that is composed mainly of cancellous bone covered by a thin layer of compact bone — compare diaphysis

More from Merriam-Webster on epiphysis

Britannica.com: Encyclopedia article about epiphysis


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