Definition of "diaphysis" [di•aph•y•sis]

• Anatomy The shaft of a long bone. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "I do not think that wrenches of the knee-joint in the act of falling can be suggested as an explanation of the frequency of effusions into that articulation, since the fractures of the femur were not always received while the erect position was maintained, and effusion was most marked when the diaphysis was the part affected, the latter point illustrating the greater resistance offered by compact bone."
• "The ulnae possess a lateral groove along the dorso-lateral surface of the diaphysis, which is lacking in NMVP 186076 and"
• "A typical long bone has a diaphysis or shaft and two epiphyses or ends."