Definition of diatom in English:

diatom

noun

Biology
  • A single-celled alga that has a cell wall of silica. Many kinds are planktonic, and extensive fossil deposits have been found.

    • ‘Algae, diatoms, dinoflagellates, and photosynthetic bacteria all belong to this group of organisms.’
    • ‘From single-celled algae called diatoms to the story of a man who plants acorns, IDFuel reminds us that inspiration for design is all around us.’
    • ‘Many are planktonic like the diatoms and Sargassum, floating free near the water surface, and being carried along by the surface currents.’
    • ‘The slime molds are now known to be a mixture of three or four unrelated groups, and the oomycetes are now classified in the Chromista, with the diatoms and brown algae.’
    • ‘For example, replacement of diatoms with chlorophytes will alter cycling of silica because diatoms require silica and chlorophytes do not.’

Origin

Mid 19th century: from modern Latin Diatoma (genus name), from Greek diatomos cut in two from diatemnein to cut through.

Pronunciation:

diatom

/ˈdīəˌtäm/