corona

co·ro·na  (k-rn)

n. pl. co·ro·nas or co·ro·nae (-n)

1. Astronomy

a. 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.

b. The luminous irregular envelope of highly ionized gas outside the chromosphere of the sun.

2. Architecture The projecting top part of a cornice.

3. A cigar with a long tapering body and blunt ends.

4. Anatomy The crownlike upper portion of a bodily part or structure, such as the top of the head.

5. Botany A crown-shaped, funnel-shaped, or trumpet-shaped outgrowth or appendage of the perianth of certain flowers, such as the daffodil or the spider lily. Also called crown.

6. Electricity A faint glow enveloping the high-field electrode in a corona discharge, often accompanied by streamers directed toward the low-field electrode.

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[Latin corna; see crown.]

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corona [kor-rone-a, -nee]

Noun

pl -nas or -nae

1. a circle of light around a luminous body, usually the moon

2. the outermost part of the sun's atmosphere, visible as a faint halo during a total eclipse

3. a long cigar with blunt ends

4. Bot a crownlike part of some flowers on top of the seed or on the inner side of the corolla

5. Physics an electrical glow appearing around the surface of a charged conductor [Latin: crown]

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corona  (k-rn)

Plural coronas or coronae (k-rn)

1. The luminous, irregular envelope of gas outside the chromosphere of a star. The Sun's corona is composed of ionized gas between approximately 1,000,000°K and 2,000,000°K and has an extremely low density. This phenomenon is visible only during a solar eclipse.

2. A faintly colored luminous ring appearing to surround a celestial body (such as the Moon or Sun) that is visible through a haze or thin cloud, caused by diffraction of light from suspended matter in the intervening medium. Also called aureole.

3. A faint glow of the air in the region of very strong electric fields, caused by ionization of the air molecules and flow of current in that region in corona discharge.

4. The crownlike upper portion of a bodily part or structure, such as the top of the head.

5. A crown-shaped structure on the inner side of the petals of some flowers, such as the daffodil.

Thesaurus

Noun	1.	corona - the outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse aureole nimbus, nimbus cloud, rain cloud - a dark grey cloud bearing rain glowing, radiance, glow - the amount of electromagnetic radiation leaving or arriving at a point on a surface
	2.	corona - (botany) the trumpet-shaped or cup-shaped outgrowth of the corolla of a daffodil or narcissus flower phytology, botany - the branch of biology that studies plants corolla - (botany) the whorl of petals of a flower that collectively form an inner floral envelope or layer of the perianth; "we cultivate the flower for its corolla" plant part, plant structure - any part of a plant or fungus
	3.	corona - an electrical discharge accompanied by ionization of surrounding atmosphere corona discharge, corposant, electric glow, Saint Elmo's fire, Saint Elmo's light, Saint Ulmo's fire, Saint Ulmo's light, St. Elmo's fire arc, electric arc, electric discharge, spark, discharge - electrical conduction through a gas in an applied electric field
	4.	corona - one or more circles of light seen around a luminous object light, visible light, visible radiation - (physics) electromagnetic radiation that can produce a visual sensation; "the light was filtered through a soft glass window"
	5.	corona - (anatomy) any structure that resembles a crown in shape anatomical structure, bodily structure, body structure, complex body part, structure - a particular complex anatomical part of a living thing; "he has good bone structure" anatomy, general anatomy - the branch of morphology that deals with the structure of animals
	6.	corona - a long cigar with blunt ends cigar - a roll of tobacco for smoking