Picoplankton

Origin

- + plankton.

Full definition of picoplankton

Noun

1. The plankton composed of cells between 0.2 and 2 micrometers.
• 2007, January 9, Douglas Martin, John Sieburth, 79, Who Studied Various Types of Marine Life, Dies, He and P. W. Johnson confirmed the recent discovery of a species of photosynthetic picoplankton, using electron microscopes to perceive fluorescence produced by the chlorophyll of the organisms.