planktonic
Of or pertaining to plankton.
Other meanings
Floating in the open sea rather than living on the seafloor.
Word history
From Ancient Greek "πλαγκτόν" (drifting).
Where this comes from
This definition is adapted from “planktonic” on Wiktionary, by its contributors, published under CC BY-SA 4.0. This page is published under the same licence.