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corona Definition

co·rona (kə rō′nə)

noun pl. -·nas or -·nae-nē

  1. a crown or something resembling a crown
  2. a circular chandelier hanging from a church ceiling
  3. a long cigar with straight sides and blunt ends
  4. Anat.
    1. a crownlike part
    2. the crown of a tooth, of a skull, etc.
  5. Archit. the top projection of a cornice
  6. Astron.
    1. the layer of ionized gas surrounding the sun, characterized by an extremely low density, an extremely high temperature, and a constantly changing shape extending great distances from the sun: clearly visible during a total solar eclipse
    2. a ring of colored light seen around a luminous body, as the sun or moon, formed by the diffraction of light caused by mist, dust, etc.
  7. Bot. an extra whorl of flower parts between the corolla and the stamens, as in the daffodil, forming a crownlike or cuplike part
  8. Elec. a luminous discharge that may occur around a high-voltage conductor due to ionization of the surrounding air

Etymology: L, crown

Corona Definition

Co·rona (kə rō′nə)

city in S Calif.: pop. 125,000

Etymology: Sp & L, wreath, crown: for the circular boulevard around the city

corona Usage Examples

Converse of object

  • heat: Therefore, only a small fraction of the total energy out put from solar is required to heat the corona.
  • call: Total solar eclipses let us see the Sun's atmosphere, called the corona, which is normally hidden from our view.
  • see: See the corona around the flame, see the darkness at the base of the flame.
  • produce: Much smaller colored rings around the sun or moon are a corona produced by water droplets rather than ice crystals.
  • observe: An introduction for a long tradition of observing the solar corona especially in the X-ray wavelength band is given in this work.
  • show: But, anything shorter than 400mm will fail to show the corona and other phenomena.

Converse of subject

  • surround: We know that during a total eclipse of the sun the moon is surrounded by a luminous corona.
  • emit: It records light that is emitted by the corona.

Adjective modifier

  • solar: The solar corona is hotter than a million degrees Celsius The Sun is our nearest star.
  • hot: The hot corona is heated by the magnetic field.
  • petit: Issue 4 New Releases In this issue we review new releases, tres petit coronas and American cigars.
  • white: A white light corona is the sum of all the coronae contributions from each spectral color.

Modifies a noun

  • ion: Figure 2. Schematic diagram showing the fate of corona ions in the atmosphere.
  • discharge: The slight blurring of the trace is due to the varying load presented by the corona discharge.
  • virus: Likewise, mice inoculated with corona virus get MS-like symptoms.
  • effect: The Winged Sun Disk is thought to have originated from the corona effect of a solar eclipse which can give the appearance of wings.
  • formation: At very high voltages there can still be some corona formation under oil.
  • tube: Filter requires cleaning approximately once every 12 months and corona tube ( which produces the ozone ) has an expected life of 1000 hours.

Noun used with modifier

line: These coronagraphs produce images of the " emission line corona.

Possessives

sun: A superb image of the sun's corona, captured during the 1999 total eclipse.