Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun diatom

1 sense of diatom

Sense 1
diatom -- (microscopic unicellular marine or freshwater colonial alga having cell walls impregnated with silica)
       => alga, algae -- (primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves)
       => phytoplankton -- (photosynthetic or plant constituent of plankton; mainly unicellular algae)