• WordNet 3.6
    • n sargassum brown algae with rounded bladders forming dense floating masses in tropical Atlantic waters as in the Sargasso Sea
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Webster's Revised Unabridged Dictionary
    • n Sargassum A genus of algæ including the gulf weed.
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Century Dictionary and Cyclopedia
    • n sargassum A genus of marine algæ, of the class Fucaceæ, having fronds attached by a disk, and branching stems with the fronds provided with a midrib and distinctly stalked air-bladders. The fruit is developed in special compound branches; the conceptacles are hermaphrodite, and the spores single in the mother-cell. This genus is the most highly organized of the Fucaceæ, and contains about 150 species, which inhabit the warmer waters of the globe, S. bacciferuin being the well-known gulfweed which floats in the open sea in great abundance and has given the name to the Sargasso Sea. Two species are found off the New England coast. See Fucaceæ, sea-grape (under grape), and cut under gulfweed.
    • n sargassum [lowercase] Gulfweed.
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Webster's Revised Unabridged Dictionary


In literature:

The sargassum and the almonds of the stone-pine completed the repast, during which the engineer spoke little.
"The Mysterious Island" by Jules Verne
I cannot admit the Sargassum case to be parallel with that of Confervae or Oscillatoria.
"More Letters of Charles Darwin" by Charles Darwin
Between him and his goal streaked mazes of sargassum.
"The Cruise of the Dry Dock" by T. S. Stribling
Indeed, this region is especially so called on account of the `Sargassum,' or weed, in the Portuguese tongue.
"The White Squall" by John Conroy Hutcheson

In news:

A day in the sargassum ON THE GULF OF MEXICO.
Fish, dolphin, sea turtles, crabs and other creatures swam along a line of sargassum 22 miles south of Mobile Bay a week ago.
While no oil was seen that day, clumps of oiled sargassum began washing up on Gulf Shores, Ala, beaches Saturday morning, June 5, 2010.
The Herald Tribune reports the seaweed is a variety of sargassum that usually stays far offshore.