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Definition of: epiphysis
(i·pif′ə·sis) noun pl ·ses (-sēz) Anat.
1. The extremity of a long bone, originally separated from it by cartilage but later consolidated with it by ossification.
2. The pineal body. [<NL <Gk., an outgrowth <epi- upon + phyein grow]
—ep·i·phys·i·al (ep′ə·fiz′ē·əl), ep′i·phys′e·al adjective
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