radiolarian

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“
"During the last 4.5 million years, at least six out of nine radiolarian extinctions occurred at magnetic reversals."

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Definitions (6)

Toggle American Heritage definitions American Heritage Dictionary (1)

  1. noun Any of various marine protozoans of the order Radiolaria, having rigid siliceous skeletons and spicules.

Toggle Century definitions Century Dictionary (3)

Toggle GNU Webster definitions GNU Webster's 1913 (1)

Toggle WordNet definitions WordNet (1)

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Examples (4)

  • "During the last 4.5 million years, at least six out of nine radiolarian extinctions occurred at magnetic reversals." —  The Reality Check
  • The key to Haeckel's vision was a tiny undersea organism called the radiolarian, one of the earliest forms of life. —  Needcoffee.com
  • Felix has a new book soon to be published that addresses magnetic reversals, another cyclical factor affecting life on Earth. “During the last 4.5 million years, at least six out of nine radiolarian extinctions occurred at magnetic reversals. †They appear to be a factor in the sudden emergence of new species so Darwin†™ s theory is likely to be reexamined. —  NewsByUs
  • Rich stores of minerals have been accumulating on the floor of the continental shelf - some freighted down the rivers from the lands; some derived from sea creatures that have died and whose remains have drifted down to the bottom; some from the shells that once encase a diatom, the streaming protoplasm of a radiolarian, or the transparent tissues of a pteropod. —  Migrations
 

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Etymologies (2)

Toggle American Heritage etymologies American Heritage Dictionary (1)

  1. From New Latin Radiolāria, order name, from Late Latin radiolus, diminutive of Latin radius, ray.

Toggle Century etymologies Century Dictionary (1)

  1. from Radiolaria + -an.
 

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/reɪdɪəˈleɪriən/
by American Heritage

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