Dictionary

diatom

noun di·a·tom \ˈdī-ə-ˌtäm\

Definition of DIATOM

:  any of a class (Bacillariophyceae) of minute planktonic unicellular or colonial algae with silicified skeletons that form diatomaceous earth
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Origin of DIATOM

ultimately from Greek diatomos cut in half, from diatemnein to cut through, from dia- + temnein to cut — more at tome
First Known Use: 1845
Medical Dictionary

diatom

noun di·a·tom \ˈdī-ə-ˌtäm\

Medical Definition of DIATOM

:  any of a class (Bacillariophyceae) of minute planktonic unicellular or colonial algae with silicified skeletons that form diatomite

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