Coquina
Pronunciation : Co*qui"na
Part of Speech : n.
Etymology : [Sp., shellfish, cockle.]
Definition : Defn: A soft, whitish, coral-like stone, formed of broken shells and corals, found in the southern United States, and used for roadbeds and for building material, as in the fort at St. Augustine, Florida.
Source : Webster's Unabridged Dictionary, 1913