conch
n. countablen. a large, spiral-shaped sea shell that people use as a horn or a decoration. In architecture, it describes a curved shape that looks like a shell.
n. a large, spiral-shaped marine mollusk or its shell, often used as a musical instrument or decorative object. In architectural contexts, it refers to a curved, shell-like form or a specific type of column capital.
The sailor used a conch to call his friends.
The architect chose a conch design for the ceiling to give the room a natural, flowing look.
While the conch is primarily known for its use in maritime signaling, its intricate spiral structure has inspired countless architectural motifs, particularly in the design of domes and vaulted ceilings.
From Latin concha, from Ancient Greek κόγχη (kónkhē). Doublet of concha.