Colombia coca is a vessel usually clay, brass or pewter. Cup. It also means hollow, with nothing inside, empty. By extension a tooth decay. Coca is also the name of several medicinal plants, among others the Erythroxylum coca, from which is extracted known as coca and cocaine alkaloid; belongs to the family Erythroxylaceae. The walnut tree, also say you coca (Juglandaceae family) and the conopodios (umbelliferae plants). In Colombia, coca is also child's play made in wood which we also call the bearing. It is the name of a municipality in the province of Segovia in Spain and another city in Ecuador (also called Francisco de Orellana), in the province of Orellana. Name of an Ecuadorian River tributary of the Napo.