fucoid Meaning, Definition & Usage

  1. noun a fossilized cast or impression of algae of the order Fucales
  2. noun any of various algae of the family Fucaceae
    fucoid algae.

WordNet

Fu"coid adjective
Etymology
Fucus + -oid.
Definitions
  1. (Bot.) (a) 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. (b) In a vague sense, resembling seaweeds, or of the nature of seaweeds.
Fu"coid noun
Definitions
  1. (Bot.) A plant, whether recent or fossil, which resembles a seaweed. See Fucoid, a.

Webster 1913