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

illuminant

play
noun il·lu·mi·nant \-nənt\

Definition of illuminant

  1. :  an illuminating device or substance



Examples of illuminant in a sentence

  1. <at the time, a spermaceti candle was the brightest indoor illuminant available>



1644

First Known Use of illuminant

1644


Medical Dictionary

illuminant

play
noun il·lu·mi·nant \-nənt\

Medical Definition of illuminant

  1. :  an illuminating device or substance (as for a microscope)




Learn More about illuminant


Seen and Heard

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

WORD OF THE DAY

to defraud especially of money

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image567572573

Which of these is a synonym of unctuous?

maudlin prompt angry oily
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