diatom

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This is a diatom, which is made of silicates.

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Definitions (5)

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  1. noun Any of various microscopic one-celled or colonial algae of the class Bacillariophyceae, having cell walls of silica consisting of two interlocking symmetrical valves.

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Examples (50)

  • There you were, about 100 million years ago, maybe a contented little diatom or a great big Brontosaurus stumbling around the edge of a tar pit – a lord of the earth.
  • He found himself in a vast cylinder walled in by turbulent currents, like the eye of a hurricane: Ahead; against the dark glowed two symbols -- diatom graphs. —  F ;SF; - vol 091 issue 04-05 - October-November 1996
  • Some people thought the dinosaurs must have designed them; others favored a passing alien race that had inadvertently—or deliberately—left behind their technology while picnicking on a beach somewhere Either way, the diatom-assembled devices worked, and scientists were suddenly busy taking them back apart and figuring out how. —  AnalogSFF,December2006
  • Last year, Siver discovered a new genus of diatom (he has discovered 60 new species over the past 20 years) that sheds light on the origin of the "raphe" -- a slit that appears along the long axis of pennate diatoms. —  TreeHugger
  • A typical diatom, Chaetoceros sp., and a phytoplankton community three weeks after fertilization. —  TreeHugger
 

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Etymologies (1)

Toggle American Heritage etymologies American Heritage Dictionary (1)

  1. New Latin diatoma, from Greek diatomos, cut in half, from diatemnein, to cut in half : dia-, dia- + temnein, to cut; see tem- in Indo-European roots.
 

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/ˈdaɪətɑm/
by American Heritage

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