corona
/kə'rounə/
Học thuậtThân thiện
Definition
- 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
- a long cigar with blunt ends
- (anatomy) any structure that resembles a crown in shape
- one or more circles of light seen around a luminous object
- an electrical discharge accompanied by ionization of surrounding atmosphere
- (botany) the trumpet-shaped or cup-shaped outgrowth of the corolla of a daffodil or narcissus flower
- the outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse