Definition of "concha" [con•cha]

• Anatomy Any of various structures, such as the external ear, that resemble a shell in shape. Also called conch. (noun)
• Architecture The half dome over an apse. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The name probably is from the Spanish word "concha," a shell."
• "Etaya is fituated on a very high bank of the river Jurnna, the fides of which confift of what in India is called concha, which is originally fand, but the conftant adion of the fun in the dry feafon forms it almofl into a vitrification."
• "The narrow-curved depression between the helix and the antihelix is called the scapha; the antihelix describes a curve around a deep, capacious cavity, the concha, which is partially divided into two parts by the crus or commencement of the helix; the upper part is termed the cymba conchæ, the lower part the cavum conchæ."