English dictionary
diatom
/'d/aI//@/t/@/m__,t/A/m/
Definitions, examples, synonyms and antonyms from WordNet 3.0.
noun
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microscopic unicellular marine or freshwater colonial alga having cell walls impregnated with silica
Source: WordNet 3.0
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One of the <i>Diatomaceæ</i>, a family of minute unicellular Algæ having a siliceous covering of great delicacy, each individual multiplying by spontaneous division. By some authors diatoms are called <i>Bacillariæ</i>, but this word is not in general use.
Source: webster1913