1. The semidome vaulting of an apse; also called a conch. 2. In Spanish architecture and its derivatives, a decorative element in the form of the interior of a sea scallop; see shell-headed.
1. The semidome vaulting of an apse; also called a conch. 2. In Spanish architecture and its derivatives, a decorative element in the form of the interior of a sea scallop; see shell-headed.