English Lexicon

Diatom

/ˈdaɪ.ə.tɒm/
nounCEFR C1 (Advanced)Top #45000 frequency
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Comprehensive Definitions & Senses

1 sense
As noun
  1. 1

    A single-celled alga which has a cell wall of silica, characteristic of both fresh and marine plankton.

    "Diatoms are major producers of oxygen in the Earth's biosphere."

Linguistic Origin & Historical Etymology

Coined in the 19th century from modern Latin 'diatoma' (plural), from Greek 'diatomos' meaning 'cut in half', from 'dia-' (through) + 'temnein' (to cut), referring to the two-part shell structure of the organism.

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