noun (plural faculae /-liː/)
- 1A bright region on the surface of the sun, linked to the subsequent appearance of sunspots in the same area.More example sentences
- Associated with sunspots are brighter areas called faculae.
- If the faculae loom above the surface, they could radiate light efficiently, thereby boosting the sun's overall brightness, especially during the solar maximum.
- Although not easily discerned in telescopic views of the Sun, these features are brilliant enough that the overall effect of the combined spots and faculae is to boost irradiance levels.
- More example sentences
- During sunspot maximum, both increased facular activity and increases in the magnetic network of bright regions associated with supergranulation are required to explain the increased luminosity.
- The competing effects of bright "facular" regions and dark sunspots, both of which are more numerous at solar maximum, seem to explain this variation.
early 18th century: from Latin, diminutive of fax, fac- 'torch'.
More definitions of faculaDefinition of facula in:
- The US English dictionary