Symphysis

Origin

From Ancient Greek, via sym- + φύσις ("growth")

Full definition of symphysis

Noun

1. The process of two, originally separate bones growing together as the mammalian subject matures, as with the pubic bones or lower jawbones in humans.
2. A line discernable on X-ray showing such fusion.
3. The cartilaginous material that adjoins and facilitates the junction of such bones, with or without synovia.