Pronunciation: /ˈfɪltrəm/
noun The vertical groove between the base of the nose and the border of the upper lip.
A1 The philtrum is the indentation between the nose and upper lip.
A2 She applied lipstick to her upper lip, careful not to cover her philtrum.
B1 The shape of a person's philtrum can vary and is often used in facial recognition technology.
B2 The philtrum is an important feature in determining the symmetry of a person's face.
C1 Plastic surgeons can perform procedures to enhance or reduce the appearance of the philtrum.
C2 Dermatologists study the philtrum as part of their research on facial anatomy and aesthetics.
formal The philtrum is the vertical groove between the base of the nose and the border of the upper lip.
informal I noticed a small dimple in her philtrum when she smiled.
slang His philtrum is like a little valley on his face.
figurative The philtrum is often referred to as the 'cupid's bow' because of its shape.
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