Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

luminosity

play
noun, lu·mi·nos·i·ty \ˌlü-mə-ˈnä-sə-tē\

Definition of luminosity

plural luminosities

  1. 1 a :  the quality or state of being luminous b :  something luminous

  2. 2 a :  the relative quantity of light b :  relative brightness of something

  3. 3 :  the relative quantity of radiation emitted by a celestial source (as a star)



Examples of luminosity in a sentence

  1. <the luminosity of the fireflies made for an enchanting nighttime show>



1634

First Known Use of luminosity

1634

Rhymes with luminosity


Medical Dictionary

luminosity

play
noun lu·mi·nos·i·ty \ˌlü-mə-ˈnäs-ət-ē\

Medical Definition of luminosity

plural luminosities

  1. 1:  the quality or state of being luminous

  2. 2a:  the relative quantity of lightb:  the comparative degree to which light of a given wavelength induces the sensation of brightness when perceived





Seen and Heard

What made you want to look up luminosity? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

the range of perception or understanding

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alt-5746713d76276

Which of these is a synonym of nonplus?

soothe disapprove reduce perplex
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ