Meaning of DIATOM in English

DIATOM

noun see: tome Date: 1845 any of a class (Bacillariophyceae) of minute planktonic unicellular or colonial algae with silicified skeletons that form ~aceous earth

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.