Definition

1. Noun:
   • A long cigar with blunt ends: A type of cigar characterized by its elongated shape and rounded, untapered ends.
   • (Anatomy) Any structure that resembles a crown in shape: A part of the body, such as a projection or ridge, that has a circular, crown-like form.
   • One or more circles of light seen around a luminous object: A luminous ring or halo, often observed around the sun, moon, or other bright light sources, caused by diffraction or refraction.
   • An electrical discharge accompanied by ionization of surrounding atmosphere: A faint glow or discharge of electricity, sometimes visible as a bluish light, caused by the ionization of air around a conductor.
   • (Botany) The trumpet-shaped or cup-shaped outgrowth of the corolla of a daffodil or narcissus flower: The prominent central part of the flower, often forming a tube or crown, distinct from the petals.
   • The outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse: The tenuous, superheated plasma envelope surrounding the sun, which becomes visible as a pearly white crown when the main solar disk is obscured.

Usage Examples

• Noun:
  • He enjoyed smoking a mild corona after dinner.
  • The corona of the glans penis is a distinct anatomical ridge.
  • A beautiful corona formed around the moon last night.
  • The high-voltage power line exhibited a faint corona discharge in the humid air.
  • The bright yellow corona is the most distinctive feature of the daffodil.
  • Scientists study the sun's corona to understand solar winds and flares.

Advanced Usage

• "Corona discharge": A specific type of electrical discharge where a conductor ionizes the surrounding air, often producing light and a hissing sound.
  • Corona discharge can cause power loss in transmission lines.
• "Coronal mass ejection (CME)": A massive burst of solar wind and magnetic fields rising above the solar corona or being released into space.
  • A powerful coronal mass ejection can disrupt satellite communications on Earth.

Variants and Related Words

• Coronal (adj): Relating to a corona or crown.
  • The study focused on coronal heating in the sun's atmosphere.
• Coronae (n): The plural form of corona, often used in scientific contexts.
  • The image revealed multiple luminous coronae around the star.

Synonyms

• Halo: A circle of light, especially around the sun or moon.
• Aureole: A radiant light around the head or body in art; a halo.
• Crown: Something resembling a crown in shape (for anatomical/botanical senses).
• Nimbus: A luminous cloud or halo.

Related Phrases

• Solar corona: Specifically refers to the sun's outer atmosphere.
  • The solar corona is much hotter than the sun's surface.
• Lunar corona: A corona observed around the moon.
  • The lunar corona was caused by ice crystals in the atmosphere.

Related Idioms

(Note: There are no common idioms centered solely on the word "corona." The word is primarily used in technical and scientific contexts.)

Noun

1. a long cigar with blunt ends
2. (anatomy) any structure that resembles a crown in shape
3. one or more circles of light seen around a luminous object
4. an electrical discharge accompanied by ionization of surrounding atmosphere
5. (botany) the trumpet-shaped or cup-shaped outgrowth of the corolla of a daffodil or narcissus flower
6. the outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse