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potamoplankton

American

[pot-uh-moh-plangk-tuhn] / ˌpɒt ə moʊˈplæŋk tən /

noun

plankton living in freshwater streams.

Etymology

Origin of potamoplankton

1900–05; < Greek potamó ( s ) river + plankton

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.