One of the mysteries of the English language finally explained.
1The depression in the external ear leading to its central opening.
- ‘The points are found, explains Sara, by imagining a baby in an inverted foetal position, with the earlobe representing the head, the concha the internal organs and so on.’
- ‘The convolutions of the external ear, particularly the concha, act to increase or decrease the amplitude of different frequency components of a sound as it passes from the free field to the eardrum.’
- ‘The skin of the cartilaginous canal is affected initially, with more severe disease affecting the concha, bony canal and tympanic membrane.’
- ‘They are inserted into the lower part of the cranial surface of the concha.’
- ‘In the majority of cases there is a combination of too much cartilage in the central bowl shaped portion of the ear called the concha, and a failure of the natural folds to develop in the portion of the ear known as the antihelix.’
2Any of several thin, scroll-like (turbinate) bones in the sides of the nasal cavity.
- ‘Each inferior nasal concha is considered a facial pair of bones since they arise from the maxillae bones and projects horizontally into the nasal cavity.’
- ‘An increase in the number of nasal conchae is common.’
- ‘He also had a large air cell (i.e., concha bullosa) within the left middle turbinate, which likely contributed to obstruction of ostia draining adjacent sinuses.’
- ‘What Wittmer does find is a very close and convincing homology between the conchae (turbinals, cristae, etc.) marked in red in the figures adapted from his review.’
- ‘From the roof, the olfactory epithelium extends down both sides of the nasal cavity to cover most of the superior concha laterally and 1 cm of nasal septum medially.’
Late 16th century: from Latin (see conch).
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