1. Plural of diaphysis; the shaft or central part of a long bone between the two ends (epiphyses).
Usage: anatomy; medical

Examples

• The diaphyses of the femurs are the longest parts of the thighbones.
• During childhood, the diaphyses and epiphyses are separated by growth plates.
• X-rays revealed fractures in the diaphyses of both tibia and fibula.
• The diaphyses contain the medullary cavity, which houses bone marrow.
• As a person matures, the diaphyses fuse with the epiphyses at the metaphysis.