/ Dictionary / Index P potamoplankton: Meaning and Definition of Find definitions for: pot•a•mo•plank•ton Pronunciation: (pot"u-mō-plangk'tun), [key] — n. plankton living in freshwater streams. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. potamogale pot arch Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language