The Collaborative International Dictionary
Schindylesis \Schin`dy*le"sis\, n. [NL., from Gr. ? a splitting into fragments.] (Anat.) A form of articulation in which one bone is received into a groove or slit in another.
Wiktionary
n. (context anatomy English) A form of articulation in which one bone is received into a groove or slit in another.
Wikipedia
Schindylesis is an articulation in which two bones are joined by fitting the ridge of one bone into the groove of another. Also known as a "wedge-and-groove" joint, the name is derived from the Greek 'skhindulesis', meaning "to cleave", as in cutting with a stump with an axe.
This fibrous suture joint can be found between the vomer and the perpendicular plate of the ethmoid bone as well as between the vomer and the gap between the maxilla and palatine.