A nostril (medical term: naris, plural nares) is one of the two external openings of the nose through which air enters and leaves.

👁 What Does “Nostril” Mean?
The word nostril refers to one of the two external openings of the nose.
Each nostril allows air to enter and exit the nasal passages. The term comes from the Old English nosu (nose) and thyrel (hole). Together, it literally means “nose hole.”
In clinical anatomy, both nostrils lead into the nasal cavity, separated by the nasal septum — a wall made of cartilage and bone.
Through these passages, air is filtered, warmed, and humidified before it reaches the lungs.
🔍 Clinical Usage
In clinical communication, doctors often mention “nostril” when describing nasal obstruction, bleeding, or examination findings.
For example, during ENT assessment, a physician might note:
“The patient’s right nostril is congested.”
or
“Bleeding observed from the left nostril.”
When patients describe their symptoms, you might hear:
“My right nostril feels blocked,”
which can suggest nasal congestion, allergies, or a deviated septum.
Understanding how to describe such findings precisely helps healthcare professionals communicate effectively — especially in OET Speaking tasks.
Try OET Practice Questions for Free
Exam-style questions with every answer explained.
Listening · Reading · Writing · Speaking — No sign-up needed
🎥 Watch the Short Video
You can also learn this word visually in our short video.
It introduces “nostril,” explains its function, and shows a common clinical example of nasal blockage.
🔗 Related Words
- Dorsum of the Nose (Bridge of the Nose)
- Ala of the Nose (Nostril Wing)
- Gingiva (Gums)
- Jaw (Mandible)
Browse every term in our Medical English Body Parts A–Z guide.


