| corona | | |
| n. (phenomenon) | 1. aureole, corona | the outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse. |
| ~ 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. |
| n. (plant) | 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. |
| n. (phenomenon) | 3. corona, 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 | an electrical discharge accompanied by ionization of surrounding atmosphere. |
| ~ arc, electric arc, electric discharge, spark, discharge | electrical conduction through a gas in an applied electric field. |
| n. (phenomenon) | 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" |
| n. (body) | 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. |
| n. (artifact) | 6. corona | a long cigar with blunt ends. |
| ~ cigar | a roll of tobacco for smoking. |
| halo | | |
| n. (attribute) | 1. aura, aureole, gloriole, glory, halo, nimbus | an indication of radiant light drawn around the head of a saint. |
| ~ lightness, light | the visual effect of illumination on objects or scenes as created in pictures.; "he could paint the lightest light and the darkest dark" |
| n. (shape) | 2. anchor ring, annulus, doughnut, halo, ring | a toroidal shape.; "a ring of ships in the harbor"; "a halo of smoke" |
| ~ fairy circle, fairy ring | a ring of fungi marking the periphery of the perennial underground growth of the mycelium. |
| ~ toroid | the doughnut-shaped object enclosed by a torus. |
| n. (phenomenon) | 3. halo | a circle of light around the sun or moon. |
| ~ atmospheric phenomenon | a physical phenomenon associated with the atmosphere. |
| ~ parhelic circle, parhelic ring, solar halo | a luminous halo parallel to the horizon at the altitude of the sun; caused by ice crystals in the atmosphere. |
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