| Ronne's nasal step | A nasal visual field defect with one margin corresponding to the retinal horizontal medium; seen in glaucoma. (05 Mar 2000) |
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| middle nasal concha | The middle thin, spongy, bony plate with curved margins, part of the ethmoidal labyrinth, projecting from the lateral wall of the nasal cavity and separating the superior meatus from the middle meatus, the above bony plate and its thick mucoperiosteum containing a cavernous vascular bed for heat exchange. Synonym: concha nasalis media, middle turbinated bone, turbinated body. (05 Mar 2000) |
| mobile part of nasal septum | The anterior movable part of the nasal septum formed by the medial crus of the greater alar cartilage on each side. Synonym: pars mobilis septi nasi, septum mobile nasi. (05 Mar 2000) |
| posterior lateral nasal arteries | Branches of the sphenopalatine artery that supply the posterior parts of the conchae and lateral nasal wall. Synonym: arteriae nasales posteriores laterales. (05 Mar 2000) |
| posterior nasal spine | The sharp posterior extremity of the nasal crest of the hard palate. Synonym: spina nasalis posterior, posterior palatine spine. (05 Mar 2000) |
| posterior superior lateral nasal branches of pterygopalatine ganglion | Branches of pterygopalatine ganglion to upper posterior part of lateral wall of nasal cavity, including superior and middle nasal concha/meatuses, and posterior ethmoidal sinuses. Synonym: rami nasales posteriores superiores laterales ganglii pterygopalatini. (05 Mar 2000) |
| posterior superior medial nasal branches of pterygopalatine ganglion | Usually branches of the nasopalatine nerve to posterior superior nasal septum. Synonym: rami nasales posteriores superiores mediales ganglii pterygopalatini. (05 Mar 2000) |
| 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) |
| 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 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) |