[TA] particular type of new cartilage produced by the epiphysis of a growing long bone; located on the epiphysial (distal) side of the zone of growth cartilage, it is a zone of relatively quiescent chondrocytes (the resting zone) of the epiphysial (growth) plate that unites the epiphysis with the shaft.epiphysial plate. SYN: cartilago epiphysialis [TA], primary cartilaginous joint*.