Fucoid

adj, noun

adj, noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A fucoid seaweed.

    "Among a number of unidentified specimens […] was one of an unusually well-defined, almost perfect frond of a fucoid."

  2. 2
    any of various algae of the family Fucaceae wordnet
  3. 3
    a fossilized cast or impression of algae of the order Fucales wordnet
Adjective
  1. 1
    Resembling or relating to seaweeds of the genus Fucus.

    "The first cell division in zygotes of the fucoid brown alga Pelvetia compressa is asymmetric […]"

  2. 2
    Of sandstone: bearing seaweed-like markings.

    "Calcareous siltstone, Cambrian Fucoid Beds, earth.ox.ac.uk webpage The Fucoid beds are quite variable in appearance in composition […] The rock unit got its name from the early belief that these markings were the compressed remains of seaweeds (fucoids). Now it is thought that they are the trails left by feeding creatures on the sea floor."

Synonyms

All synonyms
algaefucoid algaeplankton

Example

More examples

"The first cell division in zygotes of the fucoid brown alga Pelvetia compressa is asymmetric […]"

Etymology

From Ancient Greek φῦκος (phûkos, “seaweed”).

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.