A type of decorative or patterned ceramic ware, or a shell-like ornamental pattern used in architecture and design.
Possibly from Spanish 'concha' meaning shell, with Italian or Portuguese influence; related to the decorative use of shell motifs in Renaissance and Baroque design.
The shell-like spirals you see decorating old buildings and fancy ceramics often reference actual seashell chambers—nature's perfect mathematical patterns that craftspeople copied for centuries.
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