facula

[ fak-yuh-luh ]

/ ˈfæk yə lə /

SEE MORE SYNONYMS FOR facula ON THESAURUS.COM

noun, plural fac·u·lae [fak-yuh-lee] /ˈfæk yəˌli/. Astronomy.

an irregular, unusually bright patch on the sun's surface.

Nearby words

factual, factualism, factually, factum, facture, facula, faculae, facultative, facultative anaerobe, facultative apomict, facultative hyperopia

Origin of facula

1700–10; < Latin: little torch, equivalent to fac- (stem of fax) torch + -ula -ule

Related forms

fac·u·lar, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for facula

He considers it indeed "highly probable that the preparatory sign of a new spot is always a small, bright patch of facula."
A Popular History of Astronomy During the Nineteenth Century|Agnes M. (Agnes Mary) Clerke
Facula, fak′ū-la, n. a spot brighter than the rest of the surface, sometimes seen on the sun's disc:—pl.
Chambers's Twentieth Century Dictionary (part 2 of 4: E-M)|Various

British Dictionary definitions for facula

facula

/ (ˈfækjʊlə) /

noun plural -lae (-ˌliː)

any of the bright areas on the sun's surface, usually appearing just before a sunspot and subject to the same 11-year cycle

Derived Forms

facular, adjective

Word Origin for facula

C18: from Latin: little torch, from fax torch

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for facula

facula

[ făk′yə-lə ]

Plural faculae (făk′yə-lē′)

A bright, cloudlike structure on the Sun's surface, ascending several hundred kilometers above the photosphere and often associated with sunspots. Faculae are formed when a strong magnetic field heats a region of the photosphere to higher temperatures than the surrounding area. They occur all over the Sun but are usually only visible near the limb (the outer edge of the Sun's apparent disk), where the photosphere appears dimmer than in the center.