Definition of concha in English:

concha

Line breaks: con¦cha
Pronunciation: /ˈkɒŋkə
 
/

noun (plural conchae /-kiː/)

Anatomy & Zoology
  • 1A part resembling a spiral shell, in particular:
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    • A placebo point in the inferior concha and the active stomach point on the concha ridge (both innervated by vagus nerve) were isolated with the Agiscop DT.
    • The ethmoid may exhibit two to four conchae (not including the inferior or maxilloturbinate).
    • On either side of the crest are air sinuses, the sphenoid sinuses, which are partially roofed over by the sphenoid conchae.
  • 1.1The depression in the external ear leading to its central opening.
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    • 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 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.
    • 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.
  • 1.2 (also nasal concha) Any of several thin, scroll-like (turbinate) bones in the sides of the nasal cavity.
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    • 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.
    • An increase in the number of nasal conchae is common.

Origin

late 16th century: from Latin (see conch).

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