diatom

English Thesaurus

1. microscopic unicellular marine or freshwater colonial alga having cell walls impregnated with silica (noun.animal)

hypernym	:	phytoplankton,
definition	:	photosynthetic or plant constituent of plankton; mainly unicellular algae (noun.animal)

hypernym	:	alga, algae,
definition	:	primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves (noun.animal)

member meronym	:	bacillariophyceae, class bacillariophyceae, class diatomophyceae, diatomophyceae,
definition	:	marine and freshwater eukaryotic algae: diatoms (noun.animal)