- Anat. any of several structures resembling a shell in form, as a thin, bony projection inside the nasal cavity, the hollow of the external ear, or the whole external ear
- Archit. the half dome covering an apse
Origin of conchaL: see conch
- Anatomy Any of various structures, such as the external ear, that resemble a shell in shape. Also called conch .
- Architecture The half dome over an apse.
Origin of conchaLate Latin semidome from Latin mussel shell ; see conch .
(plural conchas or conchæ)
From Late Latin concha