Concha(redirected from nasal concha)
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Related to nasal concha: nasal turbinate, nasal fossa
a semidome that serves as the ceiling of the semi-cylindrical portions of buildings (an apse or niche). The concha, which originated in eastern Hellenistic architecture, was popular in Roman and Byzantine architecture and in medieval Christian religious buildings. It was often filled with mosaics or frescoes depicting Christ, the Virgin Mary, and the Christian saints.