EPIPHYSIS
epiphysis
(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
Source: WordNet® 3.1
Etymology
Noun
epiphysis (plural epiphyses)
(anatomy) The pineal gland.
(skeleton) The rounded end of any long bone.
(zoology) A small upper piece of each half of an alveolus of a sea urchin.
Source: Wiktionary
E*piph"y*sis, n.; pl. Epiphyses. Etym: [NL., fr. Gr. (Anat.)
(a) The end, or other superficial part, of a bone, which ossifies
separately from the central portion, or diaphysis.
(b) The cerebral epiphysis, or pineal gland. See Pineal gland, under
Pineal.
Source: Webster’s Unabridged Dictionary 1913 Edition