cleft palate

synonym: palatoschisis
https://doi.org/10.1351/goldbook.10534

Congenital fissure along the midline of the hard palate, that may extend into the soft palate.

Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 737 [Terms] [Paper]