The epiphyseal plate is not a joint. It is a cartilaginous growth plate found in the long bones of children and adolescents.

Here's a breakdown:

* Epiphyseal plate: A layer of hyaline cartilage that allows for the lengthwise growth of long bones.

* Joint: A point where two or more bones meet, allowing for movement.

The epiphyseal plate is essential for bone growth, and it eventually ossifies (turns to bone) during puberty, becoming the epiphyseal line.