"epiphysis" in the noun sense
1. epiphysis
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
2. pineal gland, pineal body, epiphysis cerebri, epiphysis
a small endocrine gland in the brain situated beneath the back part of the corpus callosum secretes melatonin
Source: WordNet® (An amazing lexical database of English)
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