Definition of "planktonic" [planktonic]

• Of or pertaining to plankton. (adjective)
• Floating in the open sea rather than living on the seafloor. (adjective)

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• "Bacteria that grow in biofilm communities can be as much as 10,000 times more resistant to antibiotics than the so-called planktonic bacteria, which circulate around the body as individual cells."
• "With funding from the Australian Government Department of Climate Change, Howard and his colleagues collected microscopic marine animals - called planktonic foraminifera, or forams - from the South Tasman Rise region of the Southern Ocean."
• "Change, Howard and his colleagues collected microscopic marine animals - called planktonic foraminifera, or forams - from the"