Definition of mesoplankton in English:

mesoplankton

noun

Biology
  • Plankton inhabiting the region between about 200 metres (approx. 670 feet) from the sea floor and 200 metres from the surface. More generally: relatively large microplankton.

Origin

Late 19th century. From meso- + plankton.

Pronunciation

mesoplankton

/ˌmɛsə(ʊ)ˈplaŋ(k)tən/