Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Sessile organisms, such as algae and small crustaceans, that live attached to surfaces projecting from the bottom of a freshwater aquatic environment.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A mixture of algae, cyanobacteria, heterotrophic microbes, and detritus that is attached to submerged surfaces in most aquatic ecosystems.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

New Latin, from Greek periphuton, from neuter sing. of periphutos, planted all over, from periphuein, to grow around, cling to : peri-, peri- + phuein, to grow; see bheuə- in Indo-European roots.

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