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olfactory and respiratory organ, located between the eyes. The external nose, composed of bone and cartilage, is the most prominent feature of the face in humans. The internal nose is a hollow structure above the roof of the mouth, divided by the septum into two nasal cavities that extend from the nostrils to the pharynxpharynx
, area of the gastrointestinal and respiratory tracts which lies between the mouth and the esophagus. In humans, the pharynx is a cone-shaped tube about 4 1-2 in. (11.43 cm) long.
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. The mucous membrane that lines the nasal cavities is covered with fine hairs known as cilia that help to filter dust and impurities from the air before it reaches the lungs; the air is also moistened as it passes over the sticky nasal membrane. In the human nose, there are three horizontal folds on the walls of the nasal cavities, called the conchae: other mammals may have more conchae. The uppermost concha is densely supplied with capillaries that warm the air passing over them to near body temperature. High in the nasal cavity is a small tract of mucous membrane containing the nerve cell endings of the olfactory nerve, which impart the sense of smell. Therefore, inflammation of the nasal mucous membranes, which commonly accompanies colds and other infections, not only obstructs breathing but also impairs the sense of smell.



the initial portion of the respiratory tract in vertebrate animals and in man. The nose contains the organs of smell and fulfills a protective function; it also acts as a resonator during phonation.

Located in the middle third of the visceral cranium, the nose consists of a surface portion and a nasal cavity. In man the nasal cavity is bounded by the bones of the visceral and partly the cerebral cranium; the anterior section is bounded by cartilage. The nasal cavity borders superiorly with the cranial cavity, laterally with the eye sockets, and inferiorly with the oral cavity. The anterior division of the nose opens through paired orifices, called nostrils, or nares. The nasal septum, consisting of the vomer, of cartilage, and of the vertical plate of the ethmoid bone, divides the nasal cavity into right and left halves, which open posteriorly to the nasopharynx through oval choanae. Both exterior walls of the nasal cavity contain three conchae, which divide the nasal cavity into superior, middle, and inferior nasal meatuses. The nasal cavity communicates with several air-filled cavities: the maxillary sinus, or antrum of Highmore, in the maxilla; the frontal sinus in the frontal bone; and the alveoli of the labyrinths of the ethmoid bone. The nasolacrimal canal opens into the anterior portion of the inferior nasal meatus. The nasal cavity consists of an olfactory portion and a respiratory portion. The olfactory receptors—the receiving apparatus of the olfactory analyzer—consist of neurons that are embedded in a layer of sensitive epithelium. This layer covers the mucous membrane of the superior nasal meatus, the neighboring, membranous part of the nasal septum, and the superior portion of the middle nasal concha.

The mucous membrane of the respiratory region is covered with ciliated epithelium, contains a large number of glands, and is rich in blood vessels that anastamose to form the cavernous plexuses of the nasal conchae. The walls of the vessels in the cavernous tissue of the conchae are especially rich in smooth-muscle and elastic fibers, which accounts for the ability of the cavernous tissue to rapidly swell and recede under the influence of various chemical, thermal, and nervous stimuli. When inhalation occurs through the nose, the air is slightly warmed, cleansed of dust and microorganisms, and humidified. Otorhinolaryn-gology is the branch of medicine that treats diseases of the nose.

In man, the external shape of the nose is anthropologically significant. The width of the nose varies greatly among modern racial groups. The shape is expressed by the nasal index—the ratio of the width of the nose to the height, expressed as a percentage. Three categories exist: a ratio of up to 69.9 percent results in leptorrhiny; 70.0–84.9 percent, in mesorrhiny; and 85.0–99.9 percent, in chamaerrhiny. Leptorrhiny is most characteristic of the Caucasoid race, while chamaerrhiny is mostly found in the equatorial race. The nasal index can also be determined on the skull by measuring the width of the piriform opening. The shape of the ridge of the nose can be described either by separate references to the bony and cartilaginous sections or by a single descriptive reference to the shape as a whole—concave, straight, convex, or undulate.

The height of the tip of the nose above the facial plane and the height of the bridge of the nose are important racial features. The angle of protrusion of the nasal bones is also measured on the skull. In groups of the equatorial race, nasal protrusion is slight and the bridge of the nose is usually low. In Caucasoids and American Indians, the nose protrudes greatly and the bridge is high. The remaining races occupy an intermediate position with respect to these characteristics. Other valuable anthropometric criteria are the positions of the tip and base of the nose, which can be raised, straight, or lowered, and the orientation of the narial axes, which can be transverse or sagittal.

What does it mean when you dream about a nose?

The nose is a source of much energy and wisdom. Having “a nose for the news” or “sticking one’s nose into someone else’s business” can be important messages for the dreamer to heed. A nosey neighbor or business associate may be sticking their nose into your personal life. Or the dreamer may be “brown nosing” too much at the job or in some other arena of life.


The nasal cavities and the structures surrounding and associated with them in all vertebrates.
The foremost point or section of a bomb, missile, or something similar.
(fluid mechanics)
The dense, forward part of a turbidity current.
A plunging anticline that is short and without closure.
A projecting and generally overhanging buttress of rock.
The projecting end of a hill, spur, ridge, or mountain.
The central forward part of a parabolic dune.

nosing, nose

The prominent, usually rounded, horizontal edge which extends beyond an upright face below; as the projection of a tread beyond a riser.


Nosiness (See GOSSIP.)
inventor of infernal machine; possessor of pachydermal snout. [Br. Lit.: The Jew of Malta]
for red nose, known as “knight of the burning lamp.” [Br. Lit.: Merry Wives of Windsor]
Bergerac, Cyrano de
gallant Frenchman; mocked unceasingly for extremely large nose [Fr. Lit.: Cyrano de Bergerac]
Durante, Jimmy
(“Schnozzola”) (1893–1980) American pianist-comedian with huge nose. [Radio: “The Jimmy Durante Show” in Buxton, 124–125; Am. Cinema: Halliwell, 232]
Kovalév, Major
loses social eminence when nose self-detaches. [Russ. Lit.: The Nose, Kent, 474–497]
wooden boy’s nose grows longer with every lie. [Ital. Lit.: Pinocchio;]
his red nose lit the way for Santa and his sleigh. [Am. Pop. Music: “Rudolph the Red-Nosed Reindeer”]


1. the organ of smell and entrance to the respiratory tract, consisting of a prominent structure divided into two hair-lined air passages by a median septum
2. on the nose Slang (in horse-race betting) to win only
References in periodicals archive ?
Kate Wilson says that Nosy Crow has embraced the digital formats but is also committed to forms of the print book.
Age is no barrier - with those 18 to 29 just as likely to be nosy as the over-50s, according to research out today.
Carbomask Camouflage face paint is a smooth, water-based gel suspension that is nosy to apply, comfortable to wear and washes off quickly with water.
With this news, Abraham realizes Lot is up a creek without a paddle and suggests that God spare Sodom if, after some nosy angels take a look around, fifty righteous people are found to be living there.
Most of the 180 horses will be on show and there will be all the usual entertainments to keep the children quiet(ish) while the grown-ups get on with the serious business of being nosy.
The StealthSurfer is a one of a kind product that acts as an independent browser device that protects you from nosy neighbors (like in the workplace or even at home) from knowing your Web viewing habits.
99) tells of a bear whose best friend is a nosy bird.
Nosy Crow are taking no profit from the sales of this book at all and 5 [pounds sterling] from each book will go directly to the War Child charity.
The Sustainable Energy Fund for Africa (SEFA) has approved a US $1 million grant to finalize pre-investment activities for a hybrid renewable energy project in Nosy Be Island in Madagascar.
Don't get me wrong, they're a nice bunch, quiet without being remote, friendly without being nosy.
Complaints included colleagues who talked too much, moaned, stole items of stationery or were too nosy.
Myrtle, a cranky octogenarian and retired teacher, is pretty nosy herself.