epiphysis

/əˈpɪfəsəs/

Other forms: epiphyses

Definitions of epiphysis

1. noun

   the end of a long bone; initially separated from the main bone by a layer of cartilage that eventually ossifies so the parts become fused
   type of:

   long bone, os longum

   in limbs of vertebrate animals: a long cylindrical bone that contains marrow
2. noun

   a small endocrine gland in the brain; situated beneath the back part of the corpus callosum; secretes melatonin
   synonyms: epiphysis cerebri, pineal body, pineal gland

   type of:

   ductless gland, endocrine, endocrine gland

   any of the glands of the endocrine system that secrete hormones directly into the bloodstream