coquilla nut
noun
co·quil·la nut
kəˈkiləˌ-,
kōˈkē(l)yəˌ-
: the nut of a piassava palm (Attalea funifera) of Brazil having a hard hazel-brown shell much used like vegetable ivory by turners
Word History
Etymology
modification of Portuguese coquilho, diminutive of côco coconut