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nostril

American  
[nos-truhl] / ˈnɒs trəl /

noun

  • nostrils
    plural
  1. either of the two external openings of the nose.


nostril British  
/ ˈnɒstrɪl /

noun

  1. either of the two external openings of the nose

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Noun Inflected Forms

Etymology

Origin of nostril

before 1000; Middle English nostrill, Old English nosterl, variant of nosthyrl, equivalent to nos ( u ) nose + thyrel hole; see thirl

Explanation

A nostril is one of the two holes in your nose through which you breathe, smell, and (sometimes) sneeze. Try not to get anything stuck in your nostrils; they're important passageways! Your nostrils are extremely important, since they provide a direct connection to your lungs — for air — and your olfactory nerves, which your body uses to smell things. You are almost certainly aware of your two external nostrils, but you may not know that you've got two more, inside your head at the very back of the nasal cavity. Most animals have nostrils, even fish — though they use theirs only for smelling, not for breathing. Fittingly, the Old English source of nostril, nosðirl, translates to "the hole of the nose."

Keep Reading on Vocabulary.com

Vocabulary lists containing nostril

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

This one performed the same series of tests: A camera went into my nostril.

From Slate ● Apr. 18, 2026

They introduced these virus suspensions drop-by-drop into each nostril of the piglets and monitored them for 5 days to see whether they displayed any symptoms, including changes in body temperature.

From Science Daily ● Mar. 18, 2024

Users fill them with a saline solution, then pour the liquid in one nostril.

From Seattle Times ● Mar. 13, 2024

The Mustangs scored nine points in a row while Watkins was in the locker room getting her right nostril plugged.

From Los Angeles Times ● Nov. 29, 2023

With the force of a bullet, the wad of chewing gum shot out of the keyhole and straight down Peeves’s left nostril; he whirled upright and zoomed away, cursing.

From "Harry Potter And The Prisoner Of Azkaban" by J.K. Rowling

Hundreds more horses in nearby Toronto were soon shivering, coughing and discharging an unusual mucus through their nostrils.

From The Wall Street Journal ● Sep. 7, 2026

The species also had a snout that extended farther beyond its nostrils than those of other crocodiles living at the time.

From Science Daily ● Jun. 13, 2026

Nurses and doctors wore biohazard suits and three layers of medical gloves when they entered his room, swabbing him for virus up his nostrils and in other sites like his eyelids twice a day.

From The Wall Street Journal ● May 12, 2026

"Swollen face, a fever, lameness, drooling and crusting of the nostrils - if you do come across any of those clinical signs ring the department immediately and we will investigate."

From BBC ● Dec. 6, 2025

His nostrils picked up the smell of smoke.

From "The Very, Very Far North" by Dan Bar-el

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