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
These are mainly casts of the giant fucoid alga Halymenites major, and shells of Inoceramus barabini.
A splintered fissure held delicate fucoid impressions in fine script full of meaning.
In the same strata with these inhabitants habitants of the early seas are found remains of fucoid or seaweed-like plants, the lowest of the vegetable tribe, which may have been the first of this kind of existences introduced into the world.
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 A curious set of these, with specimens of the smooth-stemmed fucoid collected by Mr. John Miller of Thurso, -- a meritorious laborer in the geologic field, -- were exhibited at Glasgow to the Association.
The fucoid of the Caithness flagstones threw off, as I have shown, in the alternate order, numerous ribbon-like branches or fronds; whereas the ribbon-like fronds or branches of the
I at one time supposed that the rectilinear, smooth-stemmed fucoid, already described, occurred in both series, as the gray stones have also their smooth-stemmed, rectilinear, tape-like organism; but the points of resemblance were too few and simple to justify the conclusion that they were identical, and I have since ascertained that they were entirely different plants.
They are the remains, in all probability, of a long flexible fucoid, like those fucoids of the intertropical seas that, streaming slantwise in the tide, rise not unfrequently to the surface in fifteen and twenty fathoms water.
Like the Lower Old Red Sandstones of Cromarty and Moray, the red arenaceous strata occur in thick beds, separated from each other by bands of a grayish-colored stratified clay, on the planes of which I could trace with great distinctness ripple markings; but in vain did I explore their numerous folds for the plates, scales, and fucoid impressions which abound in the gray argillaceous beds of the shores of the Moray and Cromarty Friths.
We have at length arrived at the tall sandstone precipices of Dunnet, with their broad decaying fronts of red and yellow; but in vain may we ply hammer and chisel among them: not a scale, not a plate, not even the stain of an imperfect fucoid appears.
Here and there a few glittering scales occur; here and there a few coprolitic patches; here and there the faint impression of a fucoid; but no organism sufficiently entire to be transferred to the bag.