diatom

Noun
  1. Microscopic unicellular marine or freshwater colonial alga having cell walls impregnated with silica (synset 101403747)
    is a type of:
    • phytoplankton - photosynthetic or plant constituent of plankton; mainly unicellular algae
    • alga, algae - primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves
    belongs to: bacillariophyceae, class bacillariophyceae, class diatomophyceae, diatomophyceae - marine and freshwater eukaryotic algae: diatoms

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