fucus

 
Pronunciation: /ˈfjuːkəs/

noun (plural fuci /ˈfjuːsʌɪ/)

  • a seaweed of a large genus of brown algae having flat leathery fronds.
    • Genus Fucus, class Phaeophyceae

Origin:

early 17th century (denoting a cosmetic): from Latin, 'rock lichen, red dye, rouge', from Greek phukos 'seaweed', of Semitic origin