Luminances is a 10 letter English word. It's valid Scrabble word worth 13 points. It's valid Words with friends word worth 19 points.
You can make 812 anagrams from letters in luminances (aceilmnnsu).
1875-80; Latin lūmin- (stem of lūmen) light + -ance
The remainder of the big room receded into a grey twilight encircling the patch of luminance.
A luminance seemed to come from above, from the unseen heights of the magnificent double staircase.
A few fluoros cast wan puddles of luminance on the plastic flooring.