Fucoid definition

fyo͝okoid
Of or belonging to the order Fucales, which includes brown algae such as gulfweed and rockweed.
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A member of the order Fucales.
noun
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A fossilized cast or impression of such an organism.
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Of or like seaweed, esp. rockweed.
adjective
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A seaweed; esp., rockweed.
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Resembling or relating to seaweeds of the genus Fucus.
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Of sandstone: containing seaweed-like markings.
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A fucoid seaweed.
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Other Word Forms

Noun

Singular:
fucoid
Plural:
fucoids

Origin of fucoid

  • fuc(us) –oid

    From American Heritage Dictionary of the English Language, 5th Edition

  • Ancient Greek φῦκος (phūkos, “seaweed”).

    From Wiktionary

Fucoid Sentence Examples

  • The Cambrian system - including the Upper (Durness-Eriboll Limestone) and the Lower (Serpulite grit, Fucoid Beds, Quartzite) - forms a narrow band which can be traced for too m.

  • Certain markings on slates and sandstones, such as the "fucoids" of Scandinavia and Scotland, the Phycoides of the Fichtelgebirge, Eophyton and other seaweed-like impressions, may indeed be the casts of fucoid plants; but it is by no means sure that many of them are not mere inorganic imitative markings or the tracks or casts of worms. Oldhamia, a delicate branching body, abundant in the Cambrian of the south-east of Ireland, is probably a calcareous alga, but its precise nature has not been satisfactorily determined.

  • In the lower series are, in descending order, the "Serpulite grits" or "Salterclla beds," the "Fucoid beds" and the "Eriboll quartzite," which is divided into an upper "Pipe rock" and lower "Basal quartzite."

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Words near fucoid in the Dictionary