Definitions

1. adjective

relating to or resembling the diaphysis, the main or midsection of a long bone, consisting of compact bone and cancellous bone, that is between the epiphyses and the metaphyses.

“The diaphyseal region of the femur bone supports most of the body’s weight.”

2. noun

a part of a long bone, especially the main or midsection.

“The diaphyseal portion of the bone is prone to fractures in older adults.”