the spiral shell of a gastropod, often used as a horn.

any of various marine gastropods.

the fabled shell trumpet of the Tritons.

( often initial capital letter ) Slang

Sometimes Disparaging

a native or inhabitant of the Florida Keys.

a Bahamian.

Also, concha. Architecture . a smooth concave surface consisting of or resembling the interior of a semidome, as the surface of a vault, a trompe, or the head of a niche.