di·aph·y·sis /daɪˈæfəsəs/
  骨幹
  di·aph·y·sis /daɪˈæfəsəs/ 名詞
  骨幹
  Di·aph·y·sis n.
  1. Bot. An abnormal prolongation of the axis of inflorescence.
  2. Anat. The shaft, or main part, of a bone, which is first ossified.
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  diaphysis
       n : the main (mid) section of a long bone [syn: shaft]
       [also: diaphyses (pl)]