Main Entry: fu·cus

Pronunciation: \ˈfyü-kəs\

Function: noun

Etymology: Latin, seaweed, archil, dye obtained from archil, from Greek phykos

Date: 1591

1 obsolete : a face paint
2 [New Latin, genus name, from Latin] : any of a genus (Fucus) of leathery marine brown algae of rocky intertidal zones that are a source of algin and have been used as fertilizer; broadly : any of various brown algae — compare rockweed