pi·co·plank·ton 
(pēkə-plăngk′tən)
(pēkə-plăngk′tən)n.
Plankton composed of organisms, chiefly bacteria and small phytoplankton, measuring from 0.2 to 2 micrometers.
- subbass
- subbranch
- subcabinet
- subcaliber
- subcarrier
- subcartilaginous
- subcategory
- subcelestial
- subcellular
- subchaser
- subclass
- subclavian
- subclavian artery
- subclavian vein
- subclimactic
- subclimax
- subclinical
- subclinically
- subcommittee
- subcompact
- subcomponent
- subconference
- subconscious
- subconsciously
- subconsciousness