Meaning

noun the aggregate of small plant and animal organisms that float or drift in great numbers in fresh or salt water

originBorrowed from German Plankton, coined by German zoologist and marine biologist Victor Hensen. By surface analysis, Ancient Greek πλαγκτός (planktós, “drifter”) + -on. Ultimately from Ancient Greek πλαγκτόν (planktón, “drifting”), neuter nominative of πλαγκτός (planktós), from πλάζομαι (plázomai, “to wander, drift”), from πλάζω (plázō, “to cause to wander, drive astray”). By surface analysis,…

Etymology from Wiktionary, CC BY-SA 3.0