epiphyseal plate

https://doi.org/10.1351/goldbook.10671

The disk of hyaline cartilage between the metaphysis and the epiphysis of an immature long bone that permits the bone to grow longer.

Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 750 [Terms] [Paper]