| joints of ear bones | The joints of the ossicular chain consisting of incudomallear joint, incudostapedeal joint, and the tympanostapedeal syndesmosis. Synonym: articulationes ossiculorum auditus, joints of ear bones. (05 Mar 2000) |
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| jugular wall of middle ear | The floor of the tympanic cavity; a thin plate of bone separating the tympanic cavity from the jugular fossa. Synonym: paries jugularis cavi tympani, fundus tympani, inferior wall of tympanic cavity, jugular wall of middle ear. (05 Mar 2000) |
| external ear | Which includes the auricle and the external acoustic, or auditory, meatus; the middle ear or the tympanic cavity with its ossicles; and the internal ear or inner ear, or labyrinth, which includes the saemicircular canals, vestibule, and cochlea. See: auricle. Synonym: auris. Origin: A.S. Eare (05 Mar 2000) |
| eye-ear plane | A standard craniometric reference plane passing through the right and left porion and the left orbitale; drawn on the profile radiograph or photograph from the superior margin of the acoustic meatus to the orbitale. Synonym: auriculo-infraorbital plane, eye-ear plane, Frankfort horizontal plane, Frankfort plane, infraorbitomeatal plane. (05 Mar 2000) |
| labyrinthine wall of middle ear | A bony layer separating the middle from the internal ear or labyrinth; it contains the fenestra vestibuli and the fenestra cochleae. Synonym: paries labyrinthicus cavi tympani, labyrinthine wall of middle ear, medial wall of middle ear. (05 Mar 2000) |
| lateral wall of middle ear | The wall formed mainly by the tympanic membrane. Synonym: paries membranaceus cavi tympani, lateral wall of middle ear, membranous wall of middle ear. (05 Mar 2000) |
| lion's ear | <botany> A name given in Western South America to certain plants with shaggy tomentose leaves, as species of Culcitium, and Espeletia. Source: Websters Dictionary (01 Mar 1998) |
| lop-ear | Congenital deformity of the external ear, with poor development of helix and anthelix. Synonym: bat ear. (05 Mar 2000) |
| low-set ear | An ear positionned below its normal location. Classified as a minor anomaly. Technically, the ear is low-set when the helix (of the ear) meets the cranium at a level below that of a horizontal plane through both inner canthi (the inside corners of the eyes). The presence of 2 or more minor anomalies in a child increases the probability that the child has a major malformation. (12 Dec 1998) |
| accessory cartilage | A sesamoid cartilage. (05 Mar 2000) |
| accessory quadrate cartilage | The two to four cartilaginous plates of the wing of the nose posterior to the greater alar cartilage. Synonym: cartilagines alares minores, accessory quadrate cartilage. (05 Mar 2000) |
| alisphenoid cartilage | The cartilage in the embryo from which the greater wing of the sphenoid bone is developed. (05 Mar 2000) |
| annular cartilage | <anatomy> The lower most of the laryngeal cartilages, may be palpated just below the thyroid prominence Adjacent the cricoid cartilage and the first tracheal ring is the cricothyroid membrane, a site used for rapid emergency airway access (cricothyroidotomy). (13 Nov 1997) |
| apex of arytenoid cartilage | The pointed upper end of the cartilage which supports the corniculate cartilage and the aryepiglottic fold. Synonym: apex cartilaginis arytenoideae. (05 Mar 2000) |
| arch of cricoid cartilage | The narrow part of the cartilage that encircles the air passage anterior to the lamina. Synonym: arcus cartilaginis cricoideae. (05 Mar 2000) |