phytoplankton

noun

phy·​to·​plank·​ton ˌfī-tō-ˈplaŋ(k)-tən How to pronounce phytoplankton (audio)
-ˌtän
plural phytoplankton also phytoplanktons
: minute aquatic photosynthetic organisms (such as dinoflagellates, diatoms, and cyanobacteria) : photosynthetic plankton of freshwater or marine environments
Twenty to 40 different species of phytoplankton … can coexist within a single cubic centimeter of water, all vying just for light and a handful of nutrients.O. Baker
Phytoplankton—myriad small, mostly unicellular algae and bacteria that occupy the surface waters of seas and lakes—dominate aquatic primary production, and over time they have radically altered Earth's atmosphere.Robert Riding
Phytoplankton form the foundation of marine food chains, and their seasonal blooms are responsible for more than half the photosynthesis, and the resulting production of oxygen, that occurs on Earth.Robin George Andrews
Antarctic krill are thumb-sized crustaceans that feast on drifting phytoplanktonUsha Lee McFarling
compare zooplankton
phytoplanktonic adjective
phytoplanktonic species
a phytoplanktonic bloom

Examples of phytoplankton in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In an attempt to address this, the USGS researchers corrected for these kinds of factors when developing the algorithm, although their model becomes less accurate when unusual components are present—such as a bloom of a specific phytoplankton species or a rare kind of dark volcanic seafloor. Newsweek, 4 Nov. 2024 Spreading iron across the ocean helps phytoplankton to grow and consume CO2, yet these organisms would also consume other nutrients, which could possibly starvesea life. Mark Fischetti, Scientific American, 24 Sep. 2024 On average, phytoplankton are only five to 10 percent heavier than seawater. Laura Baisas, Popular Science, 17 Oct. 2024 One species of bioluminescent phytoplankton called Pyrocystis noctiluca does this by ballooning six times its normal size. Laura Baisas, Popular Science, 17 Oct. 2024 See all Example Sentences for phytoplankton 

Word History

Etymology

phyto- + plankton

First Known Use

1897, in the meaning defined above

Time Traveler
The first known use of phytoplankton was in 1897

Dictionary Entries Near phytoplankton

Cite this Entry

“Phytoplankton.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/phytoplankton. Accessed 26 Nov. 2024.

Kids Definition

phytoplankton

noun
phy·​to·​plank·​ton ˌfī-tō-ˈplaŋ(k)-tən How to pronounce phytoplankton (audio)
-ˌtän
: plankton that is composed of plants

More from Merriam-Webster on phytoplankton

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!