One of the mysteries of the English language finally explained.
The shaft or central part of a long bone.Compare with epiphysis
- ‘The forces of the two opposing groups of muscles result in twisting of the epiphysis and the diaphysis in opposite directions.’
- ‘The tumor is eccentric, usually metaphyseal, but it may extend into the epiphysis or along the medullary cavity into the diaphysis.’
- ‘In both fetal and post-natal growth, the cartilage is replaced by bone in a process known as endochondral ossification, in which ossification starts in the centers (diaphyses) of the long bones and spreads outward.’
- ‘The grafts were mounted onto steel cables and snap hooks in the load frame using either the holes in the tibial diaphysis or tendon graft loops.’
- ‘Interposed between the epiphysis and the diaphysis is the cartilaginous epiphyseal plate.’
Mid 19th century: from Greek diaphusis ‘growing through’, from dia ‘through’ + phusis ‘growth’.
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