corona

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But if the corona has been a cause of terror in the past it has become a source of growing knowledge in our time The story of the first scientific observation of the corona and the prominences is thrillingly interesting, and in fact dramatic.

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Definitions (50)

Toggle American Heritage definitions American Heritage Dictionary (7)

  1. noun Astronomy A faintly colored luminous ring appearing to surround a celestial body visible through a haze or thin cloud, especially such a ring around the moon or sun, caused by diffraction of light from suspended matter in the intervening medium. Also called aureole.
  2. noun Astronomy The luminous irregular envelope of highly ionized gas outside the chromosphere of the sun.
  3. noun Architecture The projecting top part of a cornice.

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Examples (50)

  • The circle of ash at the end of his corona was uneven, burning quicker along one side than the other. —  EQMM,June2007
  • As the last crescent of the Sun vanished and the image showed the ghostly solar corona, audiences in these museums went quiet, then cheered as they first saw the coronal rays emerging from the sun—and finally erupted in discussion with their neighbors. —  FSF,September2007
  • She did not try to halt the tears spilling out of her eyes as she lay there viewing the corona, as she felt her spirit touching that of Elbryan. —  IMMORTALIS
  • Edlen was essentially saying that the corona is a plasma, an electrically-neutral "gas" teeming with positive and negative ions, free and bound electrons. —  Analog March, 1971
  • Various kinds of reactions give rise to the X-ray emission from the quiet corona, the sun's outermost layer, and the emission rates for various X-ray wavelengths are shown in Table 1. —  Analog March, 1971
 

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Etymologies (2)

Toggle American Heritage etymologies American Heritage Dictionary (1)

  1. Latin corōna; see crown.

Toggle Century etymologies Century Dictionary (1)

  1. from Latin corona, a crown, a garland: see crown.
 

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/kəˈroʊnə/
by American Heritage

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