| rat mite dermatitis | An eruption of wheals, papules, or vesicles caused by the rat mite. (05 Mar 2000) |
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| mite | 1. <zoology> A minute arachnid, of the order Acarina, of which there are many species; as, the cheese mite, sugar mite, harvest mite, etc. See Acarina. 2. [D. Mijt; prob. The same word] A small coin formerly circulated in England, rated at about a third of a farthing. The name is also applied to a small coin used in Palestine in the time of Christ. "Two mites, which make a farthing." (Mark xii. 49) 3. A small weight; one twentieth of a grain. 4. Anything very small; a minute object; a very little quantity or particle. "For in effect they be not worth a myte." (Chaucer) Origin: AS. Mite mite (in sense 1); akin to LG. Mite, D. Mijt, G. Miete, OHG. Miza; cf. Goth. Maitan to cut. Source: Websters Dictionary (01 Mar 1998) |
| mite-borne typhus | Scrub: typhus, a mite-borne infectious disease caused by a microorganism, rickettsia tsutsugamushi, characteristically with fever, headache, a raised (macular) rash, swollen glands (lymphadenopathy) and a dark crusted ulcer (called an eschar or tache noire) at the site of the chigger (mite larva) bite. This disease occurs in the area bounded by japan, india, and Australia. Known also as tsutsugamushi disease and tropical typhus. (12 Dec 1998) |
| mite-born typhus | A mild infectious disease first observed in new york city caused by rickettsia akari, transmitted from its mouse host by chigger or adult mite bites. There is fever, a dark spot that becomes a small ulcer at the site of the bite, swollen glands (lymphadenopathy) in that region, and a raised blistery (vesicular) rash. Also known as vesicular rickettsiosis. (12 Dec 1998) |
| mite infestations | Infestations with arthropods of the order acarina other than the suborder ixodides. (12 Dec 1998) |
| mite typhus | See Typhus, scrub. (12 Dec 1998) |
| water mite | <zoology> Any of numerous species of aquatic mites belonging to Hydrachna and allied genera of the family Hydrachnidae, usually having the legs fringed and adapted for swimming. They are often red or red and black in colour, and while young are parasites of fresh water insects and mussels. Synonym: water tick, and water spider. Source: Websters Dictionary (01 Mar 1998) |
| typhus, mite-borne | See Typhus, scrub. (12 Dec 1998) |
| absent nasal septum | <radiology> Cocaine, Wegener's (midline lethal granuloma), surgery, trauma, syphilis, sarcoid (12 Dec 1998) |
| accessory nasal cartilages | Variable small plates of cartilage located in the interval between the greater alar and lateral nasal cartilages. Synonym: cartilagines nasales accessoriae, sesamoid cartilages of nose. (05 Mar 2000) |
| anterior nasal aperture | The anterior nasal opening in the skull. Synonym: apertura piriformis, piriform opening. (05 Mar 2000) |
| anterior nasal spine | A pointed projection at the anterior extremity of the intermaxillary suture; the tip, as seen on a lateral cephalometric radiograph, is used as a cephalometric landmark. Synonym: spina nasalis anterior. (05 Mar 2000) |
| benign nasal tumour | A benign tumour of the posterior nasopharynx that is most common in adolescent boys. Symptoms repeated epistaxis, nasal congestion, nasal discharge and hearing loss. A skull X-ray or a CT scan of the head can confirm the presence of an angiofibroma. Treatment may include the surgical removal of the lesion if it is enlarging or blocking the airway. (27 Sep 1997) |
| bony nasal septum | The bones supporting the bony part of the nasal septum; these are the perpendicular plate of the ethmoid, the vomer, the sphenoidal rostrum, the crest of the nasal bones, the frontal spine, and the median crest formed by the apposition of the maxillary and palatine bones. Synonym: septum nasi osseum. (05 Mar 2000) |
| bony part of nasal septum | The major portion of the nasal septum supported by the vomer and the perpendicular plate of the ethmoid. Synonym: pars ossea septi nasi. (05 Mar 2000) |