| ENT | ear, nose, and throat; enzootic nasal tumor; extranodular tissue |
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| INA | infectious nucleic acid; inferior nasal artery; International Neurological Association |
| INQ | interior nasal quadrant |
| INV | inferior nasal vein |
| NAR | nasal airway resistance; National Association for Retarded [Children, Citizens]; no action required |
| septum, nasal | The dividing wall that runs down the middle of the nose so that there are normally two sides to the nose, each ending in a nostril. (12 Dec 1998) |
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| nasal | <anatomy> Pertaining to the nose. Origin: L. Nasalis (18 Nov 1997) |
| nasal arch | Bridge of the nose, the upward arching roof of the piriform aperture formed by the nasal processes of the maxilla of each side and the nasal bones between them. Eyeglasses rest centrally on various portions of this arch. (05 Mar 2000) |
| nasal atrium | The anterior expanded portion of the middle meatus of the nose, just above the vestibule. Synonym: atrium meatus medii, atrium. (05 Mar 2000) |
| nasal bone | Either of two small elongated rectangular bones that together form the bridge of the nose. (12 Dec 1998) |
| nasal border of frontal bone | The border of the frontal bone that articulates with the nasal bones. Synonym: margo nasalis ossis frontalis, nasal margin of frontal bone. (05 Mar 2000) |
| nasal calculus | <medicine> A concretion formed within the cavities of the nose. Origin: Rhino-, -lith. Source: Websters Dictionary (01 Mar 1998) |
| nasal capsule | The cartilage around the developing nasal cavity of the embryo. (05 Mar 2000) |
| nasal catarrh | <pathology> Inflammation of the mucous membrane of the nose. (18 Nov 1997) |
| nasal cavity | The proximal portion of the respiratory passages on either side of the nasal septum, lined with ciliated mucosa, extending from the nares to the pharynx. (12 Dec 1998) |
| nasal crest | The midline ridge in the floor of the nasal cavity, formed by the union of the paired maxillae and palatine bones; the vomer attaches to the crest. Synonym: crista nasalis, saemicrista incisiva. (05 Mar 2000) |
| nasal decongestants | Drugs that shrink the swollen membranes in the nose and make it easier to breath. Decongestants can be taken orally or by nasal spray. Decongestant nasal spray should not be used for more than five days without the doctor s advice, and if so, usually only when accompanied by a nasal steroid. Decongestant nasal sprays often cause a rebound effect if taken too long. A rebound effect is the worsening of symptoms when a drug is discontinued. This is a result of a tissue dependence on the medication. (12 Dec 1998) |
| nasal duct | The passage leading downward from the lacrimal sac on each side to the anterior portion of the inferior meatus of the nose, through which tears are conducted into the nasal cavity. Synonym: ductus nasolacrimalis, nasal duct. (05 Mar 2000) |
| nasal feeding | The giving of nourishment through a flexible tube passed through the nasal passages into the stomach. (05 Mar 2000) |
| nasal foramen | Vascular foramen opening on the outer surface of each nasal bone. (05 Mar 2000) |