D defs.my
Entry 2 senses Webster, 1913

Fucus

· Fu·cus · IPA /ˈfjuː.kəs/
01 n. A paint; a dye; also, false show.
pl. Fuci ((#))
  1. 1.
    A paint; a dye; also, false show.[Obs.]
  2. 2.
    A genus of tough, leathery seaweeds, usually of a dull brownish green color; rockweed.(Bot.)