nan·no·plank·ton or nan·o·plank·ton 
(nănə-plăngk′tən)
(nănə-plăngk′tən)n.
Plankton composed of organisms, chiefly small phytoplankton, measuring from 2 to 20 micrometers.
- double-double
- double dribble
- double dutch
- double-edged
- double-entendre
- double entry
- double-faced
- double fault
- double-fault
- double feature
- double fertilization
- double figure
- double flat
- double genitive
- double Gloucester
- double-handed
- doublehanded
- double-handedly
- double-header
- doubleheader
- double helix
- double-hung window
- double indemnity
- double jeopardy
- double-jointed