| otitis media | Infection and inflammation of the middle ear space and ear drum. Symptoms include earache, fever and in some cases, diminished hearing. (27 Sep 1997) |
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| otitis media with effusion | Inflammation of the middle ear with a clear pale yellow-coloured transudate. (12 Dec 1998) |
| otitis media, suppurative | Inflammation of the middle ear with purulent discharge. (12 Dec 1998) |
| oto- | <prefix> Pertaining to the ear. (12 Dec 1998) |
| otoacariasis | An infestation of the auditory canal of cats, dogs, foxes, and other animals by auricular mites, chiefly Otodectes cynotis, which infest the ears and cause considerable discomfort and tenderness; in extreme cases, they cause symptoms such as loss of appetite, wasting, and fits. See: otodectic mange. Synonym: parasitic otitis. (05 Mar 2000) |
| otoacoustic | Referring to the very faint sounds produced by the ear; thought to represent mechanical vibrations in the cochlea. (05 Mar 2000) |
| otoacoustic emissions, spontaneous | Sinusoidal tones originating in the cochlea. These faint sounds, with levels between 10-30 decibels, are usually not recognised by the persons having them. However, the emissions can be recorded using sensitive microphones placed in the ear canals. The clinical significance of having or not having spontaneous otoacoustic emissions is unclear; however, some association between tinnitus and the spontaneous emissions has been reported. (12 Dec 1998) |
| otoba fat | <chemistry> A colourless buttery substance obtained from the fruit of Myristica otoba, a species of nutmeg tree. Source: Websters Dictionary (01 Mar 1998) |
| otobiosis | Presence of larvae and the characteristic spiny nymphs of Otobius megnini in the external auditory canal of cattle, horses, cats, dogs, deer, coyotes, and other domestic and wild animals; they may remain in the ear for several months before dropping out to pupate and mature. Several records of human infection are known. (05 Mar 2000) |
| Otobius | A genus of argasid ticks similar to Ornithodoros but characterised by a granulated integument, a hypostome that is vestigial in the adult but well developed in the spiny nymphs, and the absence of eyes and hood. Two species are recognised: Otobius lagophilus (the face tick of rabbits), and Otobius megnini, the spinose ear tick that causes otobiosis in horses, cattle, sheep, dogs, and some wild animals; it occurs in southwestern parts of the U.S., where it is an important pest, and is also distributed worldwide. (05 Mar 2000) |
| otocephaly | Malformation characterised by markedly defective development of the lower jaw (micrognathia or agnathia) and the union or close approach of the ears (synotia) on the front of the neck. Origin: oto-+ G. Kephale, head (05 Mar 2000) |
| otocerebritis | Inflammation of the brain by extension of the process from the middle ear and mastoid cells. Synonym: otocerebritis. Origin: oto-+ G. Enkephalos, brain, + -itis, inflammation (05 Mar 2000) |
| otoconia | Crystalline particles of calcium carbonate and a protein adhering to the gelatinous membrane of the maculae of the utricle and saccule. Synonym: statoconia, ear crystals, otoconia, otoliths, otolites, sagitta. Origin: G. Statos, standing, + lithos, stone (05 Mar 2000) |
| otoconite | <anatomy> A mass of otoliths. An otolith. Origin: Oto- + Gr. Dust. Source: Websters Dictionary (01 Mar 1998) |
| otocrane | <anatomy> The cavity in the skull in which the parts of the internal ear are lodged. Origin: Oto- + Gr. Skull. Source: Websters Dictionary (01 Mar 1998) |