Pronunciation: [nˈɒstɹə͡l] (IPA) 
The word nostril is spelled with the combination of the letters 'n', 'o', 's', 't', 'r', 'i', and 'l', in that order. It is pronounced as /ˈnɑstrəl/ according to the International Phonetic Alphabet (IPA). The sound of 'no' is pronounced as /noʊ/, 'stril' as /strəl/. Nostril means each of the two external openings in the nose. Correct spelling of the word nostril is crucial to avoid misunderstanding and confusion in communication.
A nostril refers to either of the two external openings of the nose, situated on either side of the nasal septum. Functioning as the primary entrance and exit points for air entering and leaving the nasal cavity, nostrils are vital components of the respiratory system in humans and many other animals. Typically, these small, paired openings are positioned at the base of the nasal cavity, leading to the nasal passageways.
Nostrils serve several important functions essential to breathing. Their primary role is to allow the inhalation of air, providing oxygen necessary for respiration. Additionally, nostrils facilitate the excretion of carbon dioxide and other waste products during exhalation. Moreover, they help filter and trap impurities, such as dust, allergens, and foreign particles, preventing their entry into the respiratory system. This filtration process is aided by nose hair and a layer of mucus that lines the nasal passages, enhancing the cleansing and moisturizing of the inhaled air.
The size and shape of nostrils may differ between individuals due to genetic variations and ethnic differences. Wide or narrow nostrils can impact the flow of air and affect breathing efficiency. In certain cultures or religions, the modification or adornment of nostrils, such as piercing them with jewelry, has social or symbolic significance. Overall, nostrils play a crucial role in the respiratory process and are an integral part of the human anatomy.
Naris, one of the two external openings of the nasal fossae.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
One of the two apertures of the nose which give passage to air and to the secretions of the nose.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
* The statistics data for these misspellings percentages are collected from over 15,411,110 spell check sessions on www.spellchecker.net from Jan 2010 - Jun 2012.
The word "nostril" comes from Middle English "nosthril", which can be traced back to Old English "nosthyrl" or "nosthyrla". These Old English forms can be further broken down into "nosu" (meaning "nose") and "thyrl" (meaning "hole" or "opening"). Ultimately, "nostril" can be understood as the combination of "nose" and "hole/opening", referring to the two openings at the base of the human nose.
