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plankton

plank·ton

plankton

pronunciation:
plaengk tn
features:
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part of speech: noun
definition: a mixture of very small plants and animals floating in fresh or salt water. Most kinds of plankton are microscopic. Plankton is an important food source for many animals that live in water.
derivation: planktonic (adj.)
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See
  arthropod, crustacean, ocean