sym·phy·sis (sĭmˈfĭ-sĭs)

1. A form of cartilaginous joint in which union between two bones is effected by fibrocartilage without a synovial membrane.
2. A union, meeting point, or commissure of two structures.
3. A growing together of bones originally separate, as of the two pubic bones.
4. A line or junction thus formed.
5. A pathological adhesion or growing together.