Sunspot

//ˈsʌnspɒt// noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A region on the sun's surface with a lower temperature than its surroundings and intense magnetic activity.
  2. 2
    a cooler darker spot appearing periodically on the sun's photosphere; associated with a strong magnetic field wordnet
  3. 3
    A random shock in the foreign exchange currency market.

Synonyms

All synonyms
maculasolar spot

Example

More examples

"Most of the surface of the Sun has a temperature of about 5400 degrees C, but in a big sunspot the temperature can drop to about 4000 degrees C."

Etymology

From sun + spot.

Related phrases

sunspot number

More for "sunspot"

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.