Concha is a shell-shaped structure.
c. of ear The large shell-shaped hollow of the external ear, between the tragus and antihelix.
inferior nasal c. A thin, spongy, curved bony plate forming the lower part of the lateral wall of the nasal cavity; it articulates with the ethmoid, maxilla, palatine, and lacrimal bones.
middle nasal c. The bony middle nasal concha and its overlying mucous membrane.
sphenoidal c. A thin curved bony plate forming part of the roof of the nasal cavity.
Also called sphenoturbinal bone.
superior nasal c. The upper and smaller of the two curved bony plates projecting from the inner wall of the ethmoid in the nasal cavity.