1The vertical groove between the base of the nose and the border of the upper lip.
- ‘A 37-year-old woman presented for evaluation of a scar on her philtrum.’
- ‘Nothing makes a man more adorable than a well-shaped philtrum.’
- ‘A flat or smooth philtrum can present in persons with fetal alcohol spectrum disorders.’
- ‘The philtrum, on the upper lip, is bounded by ridges that run from under each nostril marking the fusion of the premaxilla and the lateral maxillary processes.’
- ‘Nevertheless, early correction may be indicated because the prolabium usually contains more than enough tissue to create a philtrum of normal size.’
- ‘Geordie leaned over and carefully daubed a Hitler moustache across Danny's philtrum.’
- 1.1The junction between the two halves of the upper lip or of an animal's nose.
- ‘Two dogs were presented with dermal arteritis of the nasal philtrum associated with repeated episodes of bleeding.’
- ‘A midline groove called the philtrum divides the rhinarium into two, each half containing a nostril.’
- ‘Superficial ulcers appear on the dorsum of the tongue, hard palate, and nasal philtrum.’
Latin, from Greek philtron love potion.