Congenital malformation of the midface in which the nose has a flat, wide appearance, the eyes may be wide-set, and there is a groove of varying size, running down the middle of the face across the nose.
See: Tessier classification
Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 758 (https://doi.org/10.1515/pac-2015-1202)