Define epiphysis. epiphysis synonyms, epiphysis pronunciation, epiphysis translation, English dictionary definition of epiphysis. n. pl. e·piph·y·ses 1. The end of a long bone that is originally separated from the main bone by a layer of cartilage but
The meaning of EPIPHYSIS is a part or process of a bone that ossifies separately and later becomes ankylosed to the main part of the bone; especially : an end of a long bone.