Filtrum vs. Philtrum
Filtrumnoun
alternative spelling of philtrum
Philtrumnoun
The shallow groove running down the center of the outer surface of the upper lip.
Philtrum
The philtrum (Latin: philtrum from Ancient Greek φίλτρον phíltron, lit. ), or medial cleft, is a vertical indentation in the middle area of the upper lip, common to many mammals, extending in humans from the nasal septum to the tubercle of the upper lip.
