n.
Pronunciation: ' fyü-k ə s
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 L] : 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