AskDefine | Define nostrils

User Contributed Dictionary




  1. plural of nostril

Extensive Definition

A nostril (or naris, pl. nares) is one of the two channels of the nose, from the point where they bifurcate to the external opening. In birds and mammals, they contain branched bones or cartilages called turbinates, whose function is to warm air on inhalation and remove moisture on exhalation. Fish do not breathe through their noses, but they do have two small holes used for smelling which may be called nostrils.
The Procellariiformes are distinguished from other birds by having tubular extensions of their nostrils.
In humans, the nasal cycle is the normal ultradian cycle of each nostril's blood vessels becoming engorged in swelling, then shrinking. During the course of a day, they will switch over approximately every four hours or so, meaning that only one nostril is used at any one time.


External links

nostrils in Arabic: منخر
nostrils in Catalan: Nariu
nostrils in Dhivehi: ނޭފަތުގެ ހިނދުރި
nostrils in Spanish: Narinas
nostrils in French: Narine
nostrils in Korean: 콧구멍
nostrils in Hebrew: נחיר
nostrils in Japanese: 鼻孔
nostrils in Newari: नासिका
nostrils in Portuguese: Narina
nostrils in Sicilian: Nasca (narici)
nostrils in Simple English: Nostril
nostrils in Swedish: Näsborre
nostrils in Ukrainian: Ніздрі
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