from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Of or belonging to the order Fucales, which includes brown algae such as gulfweed and rockweed.
  • n. A member of the order Fucales.
  • n. A fossilized cast or impression of such an organism.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Resembling or relating to seaweeds of the genus Fucus.
  • adj. Of sandstone: containing seaweed-like markings.
  • n. A fucoid seaweed.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Properly, belonging to an order of alga: (Fucoideæ) which are blackish in color, and produce oöspores which are not fertilized until they have escaped from the conceptacle. The common rockweeds and the gulfweed (Sargassum) are fucoid in character.
  • adj. In a vague sense, resembling seaweeds, or of the nature of seaweeds.
  • n. A plant, whether recent or fossil, which resembles a seaweed. See fucoid, a.

from The Century Dictionary and Cyclopedia

  • Pertaining to or resembling seaweeds, especially those belonging to the Fucaceæ; also applied to species of Phæosporeæ, which are sometimes classed as Fucoideæ.
  • Containing or characterized by impressions of fucoids or by markings resembling those made by fucoids. Also fucoidal, fucous.
  • n. An alga belonging to the Fucoideæ—that is, to the Fucaceæ or to the Phæosporeæ.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. any of various algae of the family Fucaceae
  • n. a fossilized cast or impression of algae of the order Fucales


fuc(us) + -oid.
(American Heritage® Dictionary of the English Language, Fourth Edition)
Ancient Greek φῦκος (phŷkos, "seaweed"). (Wiktionary)



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  • Look at the image on the far left and far right. Where did the wall go -an outcropping???

    September 24, 2011