| otic barotrauma | Middle ear problems due to changing atmospheric pressures, as when a plane descends to land. The problems include ear pain, ringing, diminished hearing and, sometimes, dizziness. Alternate terms include aerotitis: aerotitis media, barotitis, barotitis media. (12 Dec 1998) |
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| otic capsule | The cartilage capsule surrounding the inner ear mechanism; in elasmobranchs, it remains cartilaginous in the adult; in the embryos of higher vertebrates, it is cartilaginous at first but later becomes bony (at approximately 23 weeks in humans). (05 Mar 2000) |
| otic ganglion | An autonomic ganglion situated below the foramen ovale medial to the mandibular nerve; its postganglionic, parasympathetic fibres are distributed to the parotid gland. Synonym: ganglion oticum, Arnold's ganglion, auricular ganglion, otoganglion. (05 Mar 2000) |
| otic pits | Paired depressions, one on either side of the head of the embryo, marking the location of the future auditory vesicles. Synonym: otic pits. (05 Mar 2000) |
| otic placodes | Paired ectodermal placode's that sink below the general level of the superficial ectoderm to form the auditory vesicles. Synonym: otic placodes. (05 Mar 2000) |
| otic vesicle | One of the paired sacs of invaginated ectoderm that develop into the membranous labyrinth of the internal ear. Synonym: acoustic vesicle, otic vesicle. (05 Mar 2000) |
| otis | <ornithology> A genus of birds including the bustards. Origin: L, a kind of bustard, Gr. Source: Websters Dictionary (01 Mar 1998) |
| Otis, Arthur Brooks | <person> U.S. Respiratory physiologist, *1913. See: Rahn-Otis sample. (05 Mar 2000) |
| otitic | Relating to otitis. (05 Mar 2000) |
| otitic hydrocephalus | A form of thrombotic hydrocephalus associated with otitis media and thrombosis of one or both transverse sinuses of the dura. (05 Mar 2000) |
| otitic meningitis | Infection of the meninges secondary to mastoiditis or otitis media. (05 Mar 2000) |
| otitis | <pathology> Inflammation of the ear, which may be marked by pain, fever, abnormalities of hearing, hearing loss, tinnitus and vertigo. (18 Nov 1997) |
| otitis desquamativa | Otitis externa with a copious brawny desquamation. (05 Mar 2000) |
| otitis externa | Infection and inflammation of the external ear canal. Symptoms include earache, ear discharge and decreased hearing. (27 Sep 1997) |
| otitis interna | Inflammation of the inner ear. (12 Dec 1998) |