Epiphysis
Epiphysis , noun
[New Latin, from Greek 'epi`fysis, from 'epify`ein to grow upon; 'epi` upon + fy`ein to grow.]
(a)
(Anatomy) The end, or other superficial part, of a bone, which ossifies separately from the central portion, or diaphysis.
(b)
(Anatomy) The cerebral epiphysis, or pineal gland. See Pineal gland, under Pineal.