nanoplankton

Noun

 * 1) plankton between 2 and 20 microns in size.

Usage notes

 * Can refer to other size ranges

Coordinate terms

 * megaplankton (>20cm), macroplankton (2-20 cm), mesoplankton (0.2-20mm), microplankton (20-200μm), nanoplankton (2-20μm), picoplankton (0.2-2μm), femtoplankton (<0.2μm)