- the aggregate of plants and plantlike organisms in plankton.
Origin of phytoplankton
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- the photosynthesizing organisms in plankton, mainly unicellular algae and cyanobacteriaCompare zooplankton
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
Word Origin and History for phytoplankton
Online Etymology Dictionary, © 2010 Douglas Harper
- Plankton consisting of free-floating algae, protists, and cyanobacteria. Phytoplankton form the beginning of the food chain for aquatic animals and fix large amounts of carbon, which would otherwise be released as carbon dioxide.
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