noun, plural fac·u·lae [fak-yuh-lee] /ˈfæk yəˌli/. Astronomy.
Origin of facula
Examples from the Web for facula
Historical Examples of facula
Facula, fak′ū-la, n. a spot brighter than the rest of the surface, sometimes seen on the sun's disc:—pl.
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