di·​aph·​y·​sis dī-ˈa-fə-səs How to pronounce diaphysis (audio)
plural diaphyses dī-ˈa-fə-ˌsēz How to pronounce diaphysis (audio)
: the shaft of a long bone
diaphyseal adjective
or diaphysial

Example Sentences

Recent Examples on the Web Bubbly lucent lesions of bone are recalled with the FEGNOMASHIC mnemonic, but when only lucent lesions of the diaphysis are included, a more appropriate mnemonic is FEMALE. Ncbi Rofl, Discover Magazine, 21 Aug. 2012

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

Word History


New Latin, from Greek, spinous process of the tibia, from diaphyesthai to grow between, from dia- + phyein to bring forth — more at be

First Known Use

1831, in the meaning defined above

Time Traveler
The first known use of diaphysis was in 1831

Dictionary Entries Near diaphysis

Cite this Entry

“Diaphysis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diaphysis. Accessed 5 Feb. 2023.

Medical Definition


di·​aph·​y·​sis dī-ˈaf-ə-səs How to pronounce diaphysis (audio)
plural diaphyses -ˌsēz How to pronounce diaphysis (audio)
: the shaft of a long bone compare epiphysis sense 1

More from Merriam-Webster on diaphysis

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