any olive-brown seaweed or alga of the genus Fucus, having branching fronds and often air bladders.
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How to use fucus in a sentence
The largest species (E. fucicola) is parasitic on fucus, growing in brush-like tufts about an inch long.The Sea Shore | William S. Furneaux
In the typical genus—fucus—the root is a conical disc, and the frond flat or compressed and forked.The Sea Shore | William S. Furneaux
fucus and Laminaria constitute the kelp from which iodine is obtained, and were at one time the source of the potash of commerce.
This species, formerly called fucus nodosus, is next to fucus vesiculosus the most common rockweed.
It is sometimes found free, but generally attached by its extremity to eel-grass or fucus, seldom to rocks.
British Dictionary definitions for fucus
any seaweed of the genus Fucus, common in the intertidal regions of many shores and typically having greenish-brown slimy fronds: See also wrack 2 (def. 2)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012