vertical groove in the midline of the upper lip
The area from below the nose to the upper lip. Normally the philtrum is grooved. In fetal alcohol syndrome, the philtrum is flat.
the vertical groove between the nose and upper lip.
Feature of the upper lip vertical depression from nose to lip
The vertical groove above the upper lip, below the septum of the nose.
The philtrum (Greek philtron, from philein, "to love; to kiss") is the vertical groove in the upper lip, formed where the nasomedial and maxillary processes meet during embryonic development.
