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red algae

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plural noun Biology.
  1. marine algae of the phylum Rhodophyta, in which the chlorophyll is masked by a red or purplish pigment.
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Origin of red algae

First recorded in 1850–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for red algae

red algae

pl n
  1. the numerous algae that constitute the phylum Rhodophyta, which contain a red pigment in addition to chlorophyll. The group includes carrageen, dulse, and laverAlso called: red seaweed
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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