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Wiktionary:Word of the day/2021/March 15

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Word of the day
for March 15
corona n
  1. A large, round, pendent chandelier, with spikes around its upper rim to hold candles or lamps, usually hung from the roof of a church.
  2. (anatomy) An upper or crownlike portion of certain parts of the body. [...]
  3. (astronomy)
    1. The luminous plasma atmosphere of the Sun (the solar corona) or other star, extending millions of kilometres into space, most easily seen during a total solar eclipse.
    2. (also geology) An oval-shaped astrogeological feature, present on both the planet Venus and Uranus's moon Miranda, probably formed by upwellings of warm material below the surface.
  4. (by extension) Any luminous or crownlike ring around an object or person. [...]
  5. (biology) Any appendage of an organism that resembles a crown or corona [...]
  6. (electricity) A luminous appearance caused by corona discharge, often seen as a bluish glow in the air adjacent to pointed metal conductors carrying high voltages.
  7. (Ancient Rome, historical) A crown or garland bestowed among the Romans as a reward for distinguished services.

[...]

  1. (informal, also attributively) A coronavirus, especially SARS-CoV-2.
  2. (informal, also attributively) A disease caused by a coronavirus, especially COVID-19. [...]

One year ago this month, on 11 March 2020, the World Health Organization declared coronavirus disease 2019 (COVID-19) to be a pandemic.

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