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fucoid Line breaks: fu¦coid
Pronunciation: /ˈfjuːkɔɪd/

Definition of fucoid in English:


A brown seaweed or fossil plant of a group to which bladderwrack belongs.
  • Order Fucales, class Phaeophyceae, including genus Fucus
Example sentences
  • This suggests a rapid, recent evolution of at least northern hemisphere temperate fucoids.
  • It is well known that most fucoids are prevented from establishing on exposed shores by limpet grazing.
  • Without grazers to remove them, the faster growing epiphytes could outcompete fucoids by covering all surfaces or at least covering enough surface area to decrease photosynthetic activity of Fucus.


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Relating to or resembling a brown seaweed, especially a fucoid.
Example sentences
  • Ceratopteris spores, like fucoid zygotes, divide unequally to produce a small rhizoid cell and a larger cell that develops into the thallus.
  • In the fucoid zygote, polarization events can be triggered by a range of stimuli, including unidirectional light and fertilization.
  • The zygotes of the fucoid brown algae have long been studied by developmental biologists in an effort to understand how cellular polarity arises.


Mid 19th century: from fucus + -oid.

Definition of fucoid in:
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