a brownish-red discoloration of marine waters caused by the presence of enormous numbers of certain microscopic flagellates, especially the dinoflagellates, that often produce a potent neurotoxin that accumulates in the tissues of shellfish, making them poisonous when eaten by humans and other vertebrates.
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How to use red tide in a sentence
While researchers don’t yet have an answer for whether clouds disperse algae that go on to form red tides, the question is definitely worth discussing during your next teatime chat.Readers ask about Cuvier’s beaked whales, microbes in the atmosphere and more | Science News Staff | January 10, 2021 | Science News
Though the red tide is rising, overconfidence can swamp even the best campaign strategists.
The red tide now poured from all sides of the monster like brooks down a hill.Moby Dick; or The Whale | Herman Melville
A drifting peal of laughter from somewhere brought his chin up, and a red tide flooded into his cheeks.The Tempering | Charles Neville Buck
Back and forth across that narrow line surged the red tide without decisive changes in position.Kelly Miller's History of the World War for Human Rights | Kelly Miller
Thus for weeks the red tide of war ebbed and flowed, while civilization trembled in the balance.Kelly Miller's History of the World War for Human Rights | Kelly Miller
I am sick at heart to think of what may happen to this little village if the red tide of war rolls over it.The Wonder of War on Land | Francis Rolt-Wheeler
British Dictionary definitions for red tide
a discoloration of sea water caused by an explosive growth in phytoplankton density: sometimes toxic to fish life and, through accumulation in shellfish, to humans
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
Scientific definitions for red tide
A population explosion of certain species of dinoflagellates, a kind of protozoan found in plankton. The dinoflagellates color the water red or reddish-brown and secrete a toxin that kills fish. Red tide usually occurs in warm coastal waters.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.