noun
- the vertical groove or indentation on the upper lip, between the nose and the mouth
Usage: anatomy term; commonly used in medical and anthropological contexts
Examples
- The philtrum is a distinctive feature of the human face.
- In anatomy class, we learned that the philtrum is formed during fetal development.
- Some people have a more pronounced philtrum than others.
- The philtrum runs vertically from the base of the nose to the upper lip.
- Certain genetic conditions can affect the appearance of the philtrum.