Definition of fucus in English:


nounPlural fuci

  • A seaweed of a large genus of brown algae having flat leathery fronds.

    Genus Fucus, class Phaeophyceae

    • ‘A professor of microbiology at the university discovered the bacteria earlier this year growing on fucus seaweed in the Firth of Forth.’
    • ‘In 2005, it was announced that bacteria grown on Fucus have the ability to attack and kill the MRSA superbug.’
    • ‘Species of Fucus are recorded almost world-wide.’


Early 17th century (denoting a cosmetic): from Latin, ‘rock lichen, red dye, rouge’, from Greek phukos ‘seaweed’, of Semitic origin.