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n. pl. di·aph·y·ses (-sēz′) Anatomy
The shaft of a long bone.

[Greek diaphusis, spinous process of the tibia, from diaphuesthai, to grow between : dia-, dia- + phuesthai, to grow, middle voice of phuein; see bheuə- in Indo-European roots.]

di′a·phys′i·al (dī′ə-fĭz′ē-əl), di·aph′y·se′al (dī-ăf′ĭ-sē′əl, dī′ə-fĭz′ē-əl) 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.
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Adj.1.diaphysial - relating to the diaphysis of a bone
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Diaphysial nutrient foramina in long bones and miniature long bones.
(2001) performed a morphohistological analysis on in vitro cultures of metatarsals after the application of LIPUS for 6 days, observing changes in the rate of bone growth expressed in an increase in the length of the diaphysial ossification center.
The objective of the study was to determine the frequency and distribution of open diaphysial fracture of tibia gustilo type IIIA and IIIB.
Incidence of atypical subtrochanteric fractures were reported to be 78/100000 patient-years in a study from California and the highest estimated rate of atypical subtrochanteric diaphysial fractures in long-term bisphosphonates users were reported as 100/100000 patient-years in Denmark.