ˈfyükəs noun
Etymology: Latin, archil, red dye, rouge, deceit, from Greek phykos seaweed, rouge, of Semitic origin; akin to Hebrew pūk antimony used as a cosmetic
1. -es obsolete
a. : a face paint or complexion aid : cosmetic
b. : outward show : facade
God … sees through all the daubings and fucuses of hypocrisy — John Scott
2. capitalized
[New Latin, from Latin]
: a genus (the type of the family Fucaceae) of cartilaginous dichotomously branched brown algae that are blackish brown to olive green in color, have the reproductive cavities restricted to the bladder-shaped branch buds, and are used in the kelp industry and as a source of algin — compare ascophyllum
3. -es : any of various brown algae ; especially : any plant of the genus Fucus